7901864 has 16 divisors (see below), whose sum is σ = 14948820. Its totient is φ = 3915520.

The previous prime is 7901863. The next prime is 7901893. The reversal of 7901864 is 4681097.

7901864 = 382² + 383² + ... + 429².

It can be written as a sum of positive squares in 2 ways, for example, as 6100900 + 1800964 = 2470^2 + 1342^2 .

It is not an unprimeable number, because it can be changed into a prime (7901863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3467 + ... + 5274.

Almost surely, 2^7901864 is an apocalyptic number.

It is an amenable number.

7901864 is a deficient number, since it is larger than the sum of its proper divisors (7046956).

7901864 is a wasteful number, since it uses less digits than its factorization.

7901864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8860 (or 8856 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 7901864 is about 2811.0254356729. The cubic root of 7901864 is about 199.1788330385.

The spelling of 7901864 in words is "seven million, nine hundred one thousand, eight hundred sixty-four".