7644990 has 16 divisors (see below), whose sum is σ = 18348048. Its totient is φ = 2038656.

The previous prime is 7644961. The next prime is 7644991. The reversal of 7644990 is 994467.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7644991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127387 + ... + 127446.

It is an arithmetic number, because the mean of its divisors is an integer number (1146753).

Almost surely, 2^7644990 is an apocalyptic number.

7644990 is an abundant number, since it is smaller than the sum of its proper divisors (10703058).

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

7644990 is a wasteful number, since it uses less digits than its factorization.

7644990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254843.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 7644990 is about 2764.9575041942. The cubic root of 7644990 is about 196.9967103301.

The spelling of 7644990 in words is "seven million, six hundred forty-four thousand, nine hundred ninety".