7213864 has 16 divisors (see below), whose sum is σ = 15458400. Its totient is φ = 3091632.

The previous prime is 7213861. The next prime is 7213897. The reversal of 7213864 is 4683127.

It is not an unprimeable number, because it can be changed into a prime (7213861) 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, 64354 + ... + 64465.

It is an arithmetic number, because the mean of its divisors is an integer number (966150).

Almost surely, 2^7213864 is an apocalyptic number.

It is an amenable number.

7213864 is an abundant number, since it is smaller than the sum of its proper divisors (8244536).

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

7213864 is a wasteful number, since it uses less digits than its factorization.

7213864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128832 (or 128828 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 7213864 is about 2685.8637344437. The cubic root of 7213864 is about 193.2217376847.

The spelling of 7213864 in words is "seven million, two hundred thirteen thousand, eight hundred sixty-four".