7881090738 has 32 divisors (see below), whose sum is σ = 16106314752. Its totient is φ = 2570240400.

The previous prime is 7881090727. The next prime is 7881090739. The reversal of 7881090738 is 8370901887.

It is a super-2 number, since 2×7881090738² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7881090739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14806 + ... + 126417.

It is an arithmetic number, because the mean of its divisors is an integer number (503322336).

Almost surely, 2^7881090738 is an apocalyptic number.

7881090738 is an abundant number, since it is smaller than the sum of its proper divisors (8225224014).

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

7881090738 is a wasteful number, since it uses less digits than its factorization.

7881090738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141430.

The product of its (nonzero) digits is 677376, while the sum is 51.

The square root of 7881090738 is about 88775.5075344546. The cubic root of 7881090738 is about 1990.0413901814.

The spelling of 7881090738 in words is "seven billion, eight hundred eighty-one million, ninety thousand, seven hundred thirty-eight".