40397799008 has 192 divisors, whose sum is σ = 96482534400. Its totient is φ = 16286054400.

The previous prime is 40397798977. The next prime is 40397799049. The reversal of 40397799008 is 80099779304.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43957973 + ... + 43958891.

It is an arithmetic number, because the mean of its divisors is an integer number (502513200).

Almost surely, 2^40397799008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40397799008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48241267200).

40397799008 is an abundant number, since it is smaller than the sum of its proper divisors (56084735392).

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

40397799008 is a wasteful number, since it uses less digits than its factorization.

40397799008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 56.

The spelling of 40397799008 in words is "forty billion, three hundred ninety-seven million, seven hundred ninety-nine thousand, eight".