7953640 has 16 divisors (see below), whose sum is σ = 17895780. Its totient is φ = 3181440.

The previous prime is 7953619. The next prime is 7953661. The reversal of 7953640 is 463597.

It is an interprime number because it is at equal distance from previous prime (7953619) and next prime (7953661).

It can be written as a sum of positive squares in 2 ways, for example, as 7761796 + 191844 = 2786^2 + 438^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7953596 and 7953605.

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 3 ways as a sum of consecutive naturals, for example, 99381 + ... + 99460.

Almost surely, 2^7953640 is an apocalyptic number.

It is an amenable number.

7953640 is an abundant number, since it is smaller than the sum of its proper divisors (9942140).

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

7953640 is a wasteful number, since it uses less digits than its factorization.

7953640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198852 (or 198848 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 7953640 is about 2820.2198495862. The cubic root of 7953640 is about 199.6129179876.

The spelling of 7953640 in words is "seven million, nine hundred fifty-three thousand, six hundred forty".