40390687896 has 256 divisors, whose sum is σ = 114941890560. Its totient is φ = 11742382080.

The previous prime is 40390687891. The next prime is 40390687907. The reversal of 40390687896 is 69878609304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40390687891) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 101739570 + ... + 101739966.

It is an arithmetic number, because the mean of its divisors is an integer number (448991760).

Almost surely, 2^40390687896 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 40390687896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57470945280).

40390687896 is an abundant number, since it is smaller than the sum of its proper divisors (74551202664).

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

40390687896 is a wasteful number, since it uses less digits than its factorization.

40390687896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 60.

The spelling of 40390687896 in words is "forty billion, three hundred ninety million, six hundred eighty-seven thousand, eight hundred ninety-six".