7881390364 has 24 divisors (see below), whose sum is σ = 14323852928. Its totient is φ = 3791597040.

The previous prime is 7881390343. The next prime is 7881390367. The reversal of 7881390364 is 4630931887.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7881390367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330432 + ... + 353479.

Almost surely, 2^7881390364 is an apocalyptic number.

It is an amenable number.

7881390364 is a deficient number, since it is larger than the sum of its proper divisors (6442462564).

7881390364 is a wasteful number, since it uses less digits than its factorization.

7881390364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684025 (or 684023 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 7881390364 is about 88777.1950672018. The cubic root of 7881390364 is about 1990.0666092196.

The spelling of 7881390364 in words is "seven billion, eight hundred eighty-one million, three hundred ninety thousand, three hundred sixty-four".