7921600 has 42 divisors (see below), whose sum is σ = 19496024. Its totient is φ = 3168000.

The previous prime is 7921597. The next prime is 7921607. The reversal of 7921600 is 61297.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921607) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 876 + ... + 4075.

Almost surely, 2^7921600 is an apocalyptic number.

It is an amenable number.

7921600 is an abundant number, since it is smaller than the sum of its proper divisors (11574424).

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

7921600 is a wasteful number, since it uses less digits than its factorization.

7921600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4973 (or 4958 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 7921600 is about 2814.5337091604. The cubic root of 7921600 is about 199.3445207483.

Adding to 7921600 its reverse (61297), we get a palindrome (7982897).

The spelling of 7921600 in words is "seven million, nine hundred twenty-one thousand, six hundred".