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10649988 = 2233313181
BaseRepresentation
bin101000101000…
…000110000100
3202001002001000
4220220012010
510211244423
61020133300
7156344346
oct50500604
922032030
1010649988
116014548
123697230
13228b68b
1415b3296
15e05843
hexa28184

10649988 has 48 divisors (see below), whose sum is σ = 28510720. Its totient is φ = 3434400.

The previous prime is 10649987. The next prime is 10649993. The reversal of 10649988 is 88994601.

It is a super-2 number, since 2×106499882 = 226844488800288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10649981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1758 + ... + 4938.

Almost surely, 210649988 is an apocalyptic number.

10649988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10649988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14255360).

10649988 is an abundant number, since it is smaller than the sum of its proper divisors (17860732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10649988 is a wasteful number, since it uses less digits than its factorization.

10649988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225 (or 3217 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 10649988 is about 3263.4319358614. The cubic root of 10649988 is about 220.0136906081.

The spelling of 10649988 in words is "ten million, six hundred forty-nine thousand, nine hundred eighty-eight".

Divisors: 1 2 3 4 6 9 12 18 27 31 36 54 62 93 108 124 186 279 372 558 837 1116 1674 3181 3348 6362 9543 12724 19086 28629 38172 57258 85887 98611 114516 171774 197222 295833 343548 394444 591666 887499 1183332 1774998 2662497 3549996 5324994 10649988