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64493946 = 232113071061
BaseRepresentation
bin1111011000000…
…1100101111010
311111100122001200
43312001211322
5113002301241
610222155030
71412121666
oct366014572
9144318050
1064493946
1133450290
1219722a76
13104915ca
1487cb8a6
1559de4b6
hex3d8197a

64493946 has 48 divisors (see below), whose sum is σ = 153080928. Its totient is φ = 19461600.

The previous prime is 64493927. The next prime is 64493969. The reversal of 64493946 is 64939446.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60256 + ... + 61316.

It is an arithmetic number, because the mean of its divisors is an integer number (3189186).

Almost surely, 264493946 is an apocalyptic number.

64493946 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 64493946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76540464).

64493946 is an abundant number, since it is smaller than the sum of its proper divisors (88586982).

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

64493946 is a wasteful number, since it uses less digits than its factorization.

64493946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387 (or 1384 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 64493946 is about 8030.8122876830. The cubic root of 64493946 is about 401.0264180786.

The spelling of 64493946 in words is "sixty-four million, four hundred ninety-three thousand, nine hundred forty-six".

Divisors: 1 2 3 6 9 11 18 22 33 66 99 198 307 614 921 1061 1842 2122 2763 3183 3377 5526 6366 6754 9549 10131 11671 19098 20262 23342 30393 35013 60786 70026 105039 210078 325727 651454 977181 1954362 2931543 3582997 5863086 7165994 10748991 21497982 32246973 64493946