7861864 has 16 divisors (see below), whose sum is σ = 14774400. Its totient is φ = 3922032.

The previous prime is 7861853. The next prime is 7861897. The reversal of 7861864 is 4681687.

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, 4047 + ... + 5665.

It is an arithmetic number, because the mean of its divisors is an integer number (923400).

Almost surely, 2^7861864 is an apocalyptic number.

It is an amenable number.

7861864 is a deficient number, since it is larger than the sum of its proper divisors (6912536).

7861864 is a wasteful number, since it uses less digits than its factorization.

7861864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232 (or 2228 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 7861864 is about 2803.9015674592. The cubic root of 7861864 is about 198.8421768286.

The spelling of 7861864 in words is "seven million, eight hundred sixty-one thousand, eight hundred sixty-four".