40004939328 has 112 divisors (see below), whose sum is σ = 108835911360. Its totient is φ = 12962985984.

The previous prime is 40004939309. The next prime is 40004939357. The reversal of 40004939328 is 82393940004.

It is a happy number.

It is a super-2 number, since 2×40004939328² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40004939328.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1091151 + ... + 1127217.

Almost surely, 2^40004939328 is an apocalyptic number.

40004939328 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40004939328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54417955680).

40004939328 is an abundant number, since it is smaller than the sum of its proper divisors (68830972032).

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

40004939328 is a wasteful number, since it uses less digits than its factorization.

40004939328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36244 (or 36234 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 40004939328 in words is "forty billion, four million, nine hundred thirty-nine thousand, three hundred twenty-eight".