40005317928 has 32 divisors (see below), whose sum is σ = 100018323360. Its totient is φ = 13334435520.

The previous prime is 40005317903. The next prime is 40005317939. The reversal of 40005317928 is 82971350004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 753538 + ... + 804878.

It is an arithmetic number, because the mean of its divisors is an integer number (3125572605).

Almost surely, 2^40005317928 is an apocalyptic number.

It is an amenable number.

40005317928 is an abundant number, since it is smaller than the sum of its proper divisors (60013005432).

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

40005317928 is a wasteful number, since it uses less digits than its factorization.

40005317928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83817 (or 83813 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 40005317928 in words is "forty billion, five million, three hundred seventeen thousand, nine hundred twenty-eight".