25528780 has 24 divisors (see below), whose sum is σ = 56432880. Its totient is φ = 9673920.

The previous prime is 25528777. The next prime is 25528813. The reversal of 25528780 is 8782552.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33211 + ... + 33970.

It is an arithmetic number, because the mean of its divisors is an integer number (2351370).

Almost surely, 2^25528780 is an apocalyptic number.

25528780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25528780 is an abundant number, since it is smaller than the sum of its proper divisors (30904100).

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

25528780 is a wasteful number, since it uses less digits than its factorization.

25528780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67209 (or 67207 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 25528780 is about 5052.6013102164. The cubic root of 25528780 is about 294.4489569605.

The spelling of 25528780 in words is "twenty-five million, five hundred twenty-eight thousand, seven hundred eighty".