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1801996 = 227139463
BaseRepresentation
bin110110111111100001100
310101112212121
412313330030
5430130441
6102342324
721213430
oct6677414
93345777
101801996
111020959
1272a9a4
134b1291
1434c9c0
15258dd1
hex1b7f0c

1801996 has 24 divisors (see below), whose sum is σ = 3637760. Its totient is φ = 765072.

The previous prime is 1801967. The next prime is 1801997. The reversal of 1801996 is 6991081.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (1801997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3661 + ... + 4123.

21801996 is an apocalyptic number.

It is an amenable number.

1801996 is an abundant number, since it is smaller than the sum of its proper divisors (1835764).

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

1801996 is a wasteful number, since it uses less digits than its factorization.

1801996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1801996 is about 1342.3844456787. The cubic root of 1801996 is about 121.6889865434.

The spelling of 1801996 in words is "one million, eight hundred one thousand, nine hundred ninety-six".

Divisors: 1 2 4 7 14 28 139 278 463 556 926 973 1852 1946 3241 3892 6482 12964 64357 128714 257428 450499 900998 1801996