7644642 has 16 divisors (see below), whose sum is σ = 15540672. Its totient is φ = 2506320.

The previous prime is 7644617. The next prime is 7644653. The reversal of 7644642 is 2464467.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10078 + ... + 10809.

It is an arithmetic number, because the mean of its divisors is an integer number (971292).

Almost surely, 2^7644642 is an apocalyptic number.

7644642 is an abundant number, since it is smaller than the sum of its proper divisors (7896030).

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

7644642 is a wasteful number, since it uses less digits than its factorization.

7644642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20953.

The product of its digits is 32256, while the sum is 33.

The square root of 7644642 is about 2764.8945730353. The cubic root of 7644642 is about 196.9937211875.

It can be divided in two parts, 764464 and 2, that added together give a triangular number (764466 = T₁₂₃₆).

The spelling of 7644642 in words is "seven million, six hundred forty-four thousand, six hundred forty-two".