25422720 has 64 divisors (see below), whose sum is σ = 81041040. Its totient is φ = 6778880.

The previous prime is 25422713. The next prime is 25422743. The reversal of 25422720 is 2722452.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4701 + ... + 8540.

Almost surely, 2^25422720 is an apocalyptic number.

25422720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25422720 is an abundant number, since it is smaller than the sum of its proper divisors (55618320).

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

25422720 is a wasteful number, since it uses less digits than its factorization.

25422720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13263 (or 13251 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 25422720 is about 5042.0948027581. The cubic root of 25422720 is about 294.0406256045.

The spelling of 25422720 in words is "twenty-five million, four hundred twenty-two thousand, seven hundred twenty".