25128608 has 12 divisors (see below), whose sum is σ = 49472010. Its totient is φ = 12564288.

The previous prime is 25128599. The next prime is 25128611. The reversal of 25128608 is 80682152.

25128608 = 262² + 263² + ... + 453².

It can be written as a sum of positive squares in only one way, i.e., 25120144 + 8464 = 5012^2 + 92^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 785269 = 25128608 / (2 + 5 + 1 + 2 + 8 + 6 + 0 + 8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392603 + ... + 392666.

Almost surely, 2^25128608 is an apocalyptic number.

It is an amenable number.

25128608 is a deficient number, since it is larger than the sum of its proper divisors (24343402).

25128608 is an equidigital number, since it uses as much as digits as its factorization.

25128608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785279 (or 785271 counting only the distinct ones).

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

The square root of 25128608 is about 5012.8443023896. The cubic root of 25128608 is about 292.9023192424.

The spelling of 25128608 in words is "twenty-five million, one hundred twenty-eight thousand, six hundred eight".