8139486400 has 42 divisors (see below), whose sum is σ = 20028227660. Its totient is φ = 3255793920.

The previous prime is 8139486391. The next prime is 8139486409. The reversal of 8139486400 is 46849318.

It is an interprime number because it is at equal distance from previous prime (8139486391) and next prime (8139486409).

It is not an unprimeable number, because it can be changed into a prime (8139486409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2541990 + ... + 2545189.

Almost surely, 2^8139486400 is an apocalyptic number.

8139486400 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8139486400 is an abundant number, since it is smaller than the sum of its proper divisors (11888741260).

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

8139486400 is a wasteful number, since it uses less digits than its factorization.

8139486400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5087201 (or 5087186 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 8139486400 is about 90219.1021901681. The cubic root of 8139486400 is about 2011.5569564138.

The spelling of 8139486400 in words is "eight billion, one hundred thirty-nine million, four hundred eighty-six thousand, four hundred".