25680490 has 32 divisors (see below), whose sum is σ = 50782464. Its totient is φ = 9272640.

The previous prime is 25680481. The next prime is 25680521. The reversal of 25680490 is 9408652.

It is a happy 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, 16527 + ... + 18013.

It is an arithmetic number, because the mean of its divisors is an integer number (1586952).

Almost surely, 2^25680490 is an apocalyptic number.

25680490 is a deficient number, since it is larger than the sum of its proper divisors (25101974).

25680490 is a wasteful number, since it uses less digits than its factorization.

25680490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 25680490 is about 5067.5921303909. The cubic root of 25680490 is about 295.0310797476.

The spelling of 25680490 in words is "twenty-five million, six hundred eighty thousand, four hundred ninety".