25128680 has 16 divisors (see below), whose sum is σ = 56539620. Its totient is φ = 10051456.

The previous prime is 25128671. The next prime is 25128707. The reversal of 25128680 is 8682152.

It can be written as a sum of positive squares in 2 ways, for example, as 25060036 + 68644 = 5006^2 + 262^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314069 + ... + 314148.

Almost surely, 2^25128680 is an apocalyptic number.

25128680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25128680 is an abundant number, since it is smaller than the sum of its proper divisors (31410940).

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

25128680 is a wasteful number, since it uses less digits than its factorization.

25128680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628228 (or 628224 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 25128680 is about 5012.8514839361. The cubic root of 25128680 is about 292.9025989893.

The spelling of 25128680 in words is "twenty-five million, one hundred twenty-eight thousand, six hundred eighty".