7672640 has 28 divisors (see below), whose sum is σ = 18271236. Its totient is φ = 3068928.

The previous prime is 7672633. The next prime is 7672657. The reversal of 7672640 is 462767.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3041536 + 4631104 = 1744^2 + 2152^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 7672597 and 7672606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11669 + ... + 12308.

Almost surely, 2^7672640 is an apocalyptic number.

It is an amenable number.

7672640 is an abundant number, since it is smaller than the sum of its proper divisors (10598596).

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

7672640 is a wasteful number, since it uses less digits than its factorization.

7672640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23994 (or 23984 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 7672640 is about 2769.9530681945. The cubic root of 7672640 is about 197.2339203829.

The spelling of 7672640 in words is "seven million, six hundred seventy-two thousand, six hundred forty".