40401856 has 28 divisors (see below), whose sum is σ = 87462360. Its totient is φ = 18364160.

The previous prime is 40401839. The next prime is 40401857. The reversal of 40401856 is 65810404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40401857) 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, 27991 + ... + 29398.

Almost surely, 2^40401856 is an apocalyptic number.

It is an amenable number.

40401856 is an abundant number, since it is smaller than the sum of its proper divisors (47060504).

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

40401856 is a wasteful number, since it uses less digits than its factorization.

40401856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57412 (or 57402 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 40401856 is about 6356.2454326434. The cubic root of 40401856 is about 343.1366487972.

The spelling of 40401856 in words is "forty million, four hundred one thousand, eight hundred fifty-six".