7863864 has 16 divisors (see below), whose sum is σ = 19659720. Its totient is φ = 2621280.

The previous prime is 7863851. The next prime is 7863881. The reversal of 7863864 is 4683687.

It is a d-powerful number, because it can be written as 7⁸ + 8³ + 6 + 3⁴ + 8⁷ + 6⁴ + 4² .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163807 + ... + 163854.

Almost surely, 2^7863864 is an apocalyptic number.

It is an amenable number.

7863864 is an abundant number, since it is smaller than the sum of its proper divisors (11795856).

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

7863864 is a wasteful number, since it uses less digits than its factorization.

7863864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327670 (or 327666 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 7863864 is about 2804.2581906807. The cubic root of 7863864 is about 198.8590367249.

The spelling of 7863864 in words is "seven million, eight hundred sixty-three thousand, eight hundred sixty-four".