7312644 has 36 divisors (see below), whose sum is σ = 19459440. Its totient is φ = 2309040.

The previous prime is 7312639. The next prime is 7312681. The reversal of 7312644 is 4462137.

7312644 is a `hidden beast` number, since 7 + 3 + 12 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4662 + ... + 6029.

It is an arithmetic number, because the mean of its divisors is an integer number (540540).

Almost surely, 2^7312644 is an apocalyptic number.

It is an amenable number.

7312644 is an abundant number, since it is smaller than the sum of its proper divisors (12146796).

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

7312644 is a wasteful number, since it uses less digits than its factorization.

7312644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10720 (or 10715 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 7312644 is about 2704.1900820763. The cubic root of 7312644 is about 194.0996759899.

It can be divided in two parts, 731 and 2644, that added together give a cube (3375 = 15³).

The spelling of 7312644 in words is "seven million, three hundred twelve thousand, six hundred forty-four".