40439290496 has 64 divisors (see below), whose sum is σ = 88378063200. Its totient is φ = 18278691840.

The previous prime is 40439290403. The next prime is 40439290499. The reversal of 40439290496 is 69409293404.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (40439290499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171806 + ... + 332258.

Almost surely, 2^40439290496 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 40439290496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44189031600).

40439290496 is an abundant number, since it is smaller than the sum of its proper divisors (47938772704).

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

40439290496 is a wasteful number, since it uses less digits than its factorization.

40439290496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160657 (or 160645 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 50.

The spelling of 40439290496 in words is "forty billion, four hundred thirty-nine million, two hundred ninety thousand, four hundred ninety-six".