25317890 has 48 divisors (see below), whose sum is σ = 50279616. Its totient is φ = 9172800.

The previous prime is 25317889. The next prime is 25317923. The reversal of 25317890 is 9871352.

It is a self number, because there is not a number n which added to its sum of digits gives 25317890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119885 + ... + 120095.

It is an arithmetic number, because the mean of its divisors is an integer number (1047492).

Almost surely, 2^25317890 is an apocalyptic number.

25317890 is a deficient number, since it is larger than the sum of its proper divisors (24961726).

25317890 is a wasteful number, since it uses less digits than its factorization.

25317890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 25317890 is about 5031.6885833684. The cubic root of 25317890 is about 293.6359122373.

The spelling of 25317890 in words is "twenty-five million, three hundred seventeen thousand, eight hundred ninety".