25402880 has 40 divisors (see below), whose sum is σ = 60913512. Its totient is φ = 10160128.

The previous prime is 25402873. The next prime is 25402963. The reversal of 25402880 is 8820452.

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

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2402 + ... + 7521.

Almost surely, 2^25402880 is an apocalyptic number.

25402880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25402880 is an abundant number, since it is smaller than the sum of its proper divisors (35510632).

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

25402880 is an frugal number, since it uses more digits than its factorization.

25402880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9946 (or 9930 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 25402880 is about 5040.1269825273. The cubic root of 25402880 is about 293.9641155086.

The spelling of 25402880 in words is "twenty-five million, four hundred two thousand, eight hundred eighty".