40451556 has 12 divisors (see below), whose sum is σ = 94386992. Its totient is φ = 13483848.

The previous prime is 40451539. The next prime is 40451557. The reversal of 40451556 is 65515404.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×40451556² = 3272656765642272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40451557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1685470 + ... + 1685493.

Almost surely, 2^40451556 is an apocalyptic number.

It is an amenable number.

40451556 is an abundant number, since it is smaller than the sum of its proper divisors (53935436).

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

40451556 is a wasteful number, since it uses less digits than its factorization.

40451556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3370970 (or 3370968 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 40451556 is about 6360.1537717260. The cubic root of 40451556 is about 343.2772933534.

The spelling of 40451556 in words is "forty million, four hundred fifty-one thousand, five hundred fifty-six".