7925640 has 32 divisors (see below), whose sum is σ = 23777280. Its totient is φ = 2113472.

The previous prime is 7925629. The next prime is 7925651. The reversal of 7925640 is 465297.

It is an interprime number because it is at equal distance from previous prime (7925629) and next prime (7925651).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32904 + ... + 33143.

It is an arithmetic number, because the mean of its divisors is an integer number (743040).

Almost surely, 2^7925640 is an apocalyptic number.

It is an amenable number.

7925640 is an abundant number, since it is smaller than the sum of its proper divisors (15851640).

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

7925640 is a wasteful number, since it uses less digits than its factorization.

7925640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66061 (or 66057 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 7925640 is about 2815.2513209303. The cubic root of 7925640 is about 199.3784034233.

The spelling of 7925640 in words is "seven million, nine hundred twenty-five thousand, six hundred forty".