7642638 has 24 divisors (see below), whose sum is σ = 16628976. Its totient is φ = 2536800.

The previous prime is 7642627. The next prime is 7642669. The reversal of 7642638 is 8362467.

7642638 is a `hidden beast` number, since 7 + 642 + 6 + 3 + 8 = 666.

7642638 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4303 + ... + 5813.

It is an arithmetic number, because the mean of its divisors is an integer number (692874).

Almost surely, 2^7642638 is an apocalyptic number.

7642638 is an abundant number, since it is smaller than the sum of its proper divisors (8986338).

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

7642638 is a wasteful number, since it uses less digits than its factorization.

7642638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800 (or 1797 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 7642638 is about 2764.5321484837. The cubic root of 7642638 is about 196.9765060837.

The spelling of 7642638 in words is "seven million, six hundred forty-two thousand, six hundred thirty-eight".