40408232928 has 96 divisors (see below), whose sum is σ = 123212113920. Its totient is φ = 11355932160.

The previous prime is 40408232927. The next prime is 40408232941. The reversal of 40408232928 is 82923280404.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 40408232928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40408232927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451888 + ... + 533871.

It is an arithmetic number, because the mean of its divisors is an integer number (1283459520).

Almost surely, 2^40408232928 is an apocalyptic number.

40408232928 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40408232928 is an abundant number, since it is smaller than the sum of its proper divisors (82803880992).

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

40408232928 is a wasteful number, since it uses less digits than its factorization.

40408232928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985840 (or 985832 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 40408232928 in words is "forty billion, four hundred eight million, two hundred thirty-two thousand, nine hundred twenty-eight".