7890431736 has 128 divisors (see below), whose sum is σ = 22345943040. Its totient is φ = 2300121600.

The previous prime is 7890431683. The next prime is 7890431743. The reversal of 7890431736 is 6371340987.

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, 1413046 + ... + 1418618.

It is an arithmetic number, because the mean of its divisors is an integer number (174577680).

Almost surely, 2^7890431736 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 7890431736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11172971520).

7890431736 is an abundant number, since it is smaller than the sum of its proper divisors (14455511304).

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

7890431736 is a wasteful number, since it uses less digits than its factorization.

7890431736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5797 (or 5793 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 48.

The square root of 7890431736 is about 88828.1021749311. The cubic root of 7890431736 is about 1990.8273064948.

The spelling of 7890431736 in words is "seven billion, eight hundred ninety million, four hundred thirty-one thousand, seven hundred thirty-six".