7640642 has 4 divisors (see below), whose sum is σ = 11460966. Its totient is φ = 3820320.

The previous prime is 7640621. The next prime is 7640681. The reversal of 7640642 is 2460467.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7612081 + 28561 = 2759^2 + 169^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1910159 + ... + 1910162.

Almost surely, 2^7640642 is an apocalyptic number.

7640642 is a deficient number, since it is larger than the sum of its proper divisors (3820324).

7640642 is a wasteful number, since it uses less digits than its factorization.

7640642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820323.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 7640642 is about 2764.1711235016. The cubic root of 7640642 is about 196.9593567111.

The spelling of 7640642 in words is "seven million, six hundred forty thousand, six hundred forty-two".