40401078732 has 72 divisors (see below), whose sum is σ = 117027406496. Its totient is φ = 11512191744.

The previous prime is 40401078727. The next prime is 40401078827. The reversal of 40401078732 is 23787010404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 120913 + ... + 308904.

Almost surely, 2^40401078732 is an apocalyptic number.

40401078732 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

40401078732 is an abundant number, since it is smaller than the sum of its proper divisors (76626327764).

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

40401078732 is a wasteful number, since it uses less digits than its factorization.

40401078732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430207 (or 430202 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The spelling of 40401078732 in words is "forty billion, four hundred one million, seventy-eight thousand, seven hundred thirty-two".