25804780 has 24 divisors (see below), whose sum is σ = 56059920. Its totient is φ = 9965760.

The previous prime is 25804777. The next prime is 25804811. The reversal of 25804780 is 8740852.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21666 + ... + 22825.

It is an arithmetic number, because the mean of its divisors is an integer number (2335830).

Almost surely, 2^25804780 is an apocalyptic number.

25804780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25804780 is an abundant number, since it is smaller than the sum of its proper divisors (30255140).

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

25804780 is a wasteful number, since it uses less digits than its factorization.

25804780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44529 (or 44527 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 25804780 is about 5079.8405486787. The cubic root of 25804780 is about 295.5062837276.

The spelling of 25804780 in words is "twenty-five million, eight hundred four thousand, seven hundred eighty".