25621480 has 32 divisors (see below), whose sum is σ = 57803040. Its totient is φ = 10221120.

The previous prime is 25621459. The next prime is 25621487. The reversal of 25621480 is 8412652.

It is not an unprimeable number, because it can be changed into a prime (25621487) 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, 21295 + ... + 22465.

It is an arithmetic number, because the mean of its divisors is an integer number (1806345).

Almost surely, 2^25621480 is an apocalyptic number.

25621480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25621480 is an abundant number, since it is smaller than the sum of its proper divisors (32181560).

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

25621480 is a wasteful number, since it uses less digits than its factorization.

25621480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729 (or 1725 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 25621480 is about 5061.7664900704. The cubic root of 25621480 is about 294.8049270521.

It can be divided in two parts, 256 and 21480, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 25621480 in words is "twenty-five million, six hundred twenty-one thousand, four hundred eighty".