25620440 has 32 divisors (see below), whose sum is σ = 58348080. Its totient is φ = 10123392.

The previous prime is 25620433. The next prime is 25620443. The reversal of 25620440 is 4402652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25620443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539 + ... + 7178.

Almost surely, 2^25620440 is an apocalyptic number.

25620440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25620440 is an abundant number, since it is smaller than the sum of its proper divisors (32727640).

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

25620440 is a wasteful number, since it uses less digits than its factorization.

25620440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7811 (or 7807 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 25620440 is about 5061.6637580938. The cubic root of 25620440 is about 294.8009381949.

The spelling of 25620440 in words is "twenty-five million, six hundred twenty thousand, four hundred forty".