25789980 has 48 divisors (see below), whose sum is σ = 72565920. Its totient is φ = 6843648.

The previous prime is 25789979. The next prime is 25789991. The reversal of 25789980 is 8998752.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12802 + ... + 14678.

It is an arithmetic number, because the mean of its divisors is an integer number (1511790).

Almost surely, 2^25789980 is an apocalyptic number.

25789980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25789980 is an abundant number, since it is smaller than the sum of its proper divisors (46775940).

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

25789980 is a wasteful number, since it uses less digits than its factorization.

25789980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118 (or 2116 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 25789980 is about 5078.3836011077. The cubic root of 25789980 is about 295.4497783129.

The spelling of 25789980 in words is "twenty-five million, seven hundred eighty-nine thousand, nine hundred eighty".