7868090640 has 40 divisors (see below), whose sum is σ = 24391081728. Its totient is φ = 2098157440.

The previous prime is 7868090621. The next prime is 7868090653. The reversal of 7868090640 is 460908687.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 7868090640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16391616 + ... + 16392095.

Almost surely, 2^7868090640 is an apocalyptic number.

It is an amenable number.

7868090640 is an abundant number, since it is smaller than the sum of its proper divisors (16522991088).

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

7868090640 is a wasteful number, since it uses less digits than its factorization.

7868090640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32783727 (or 32783721 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 7868090640 is about 88702.2583703482. The cubic root of 7868090640 is about 1988.9465767916.

The spelling of 7868090640 in words is "seven billion, eight hundred sixty-eight million, ninety thousand, six hundred forty".