25642480 has 40 divisors (see below), whose sum is σ = 61237152. Its totient is φ = 9978624.

The previous prime is 25642471. The next prime is 25642483. The reversal of 25642480 is 8424652.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25642483) 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, 1372 + ... + 7291.

Almost surely, 2^25642480 is an apocalyptic number.

25642480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25642480 is an abundant number, since it is smaller than the sum of its proper divisors (35594672).

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

25642480 is a wasteful number, since it uses less digits than its factorization.

25642480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8713 (or 8707 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 25642480 is about 5063.8404398243. The cubic root of 25642480 is about 294.8854481985.

The spelling of 25642480 in words is "twenty-five million, six hundred forty-two thousand, four hundred eighty".