25680590 has 64 divisors (see below), whose sum is σ = 54008640. Its totient is φ = 8709120.

The previous prime is 25680583. The next prime is 25680607. The reversal of 25680590 is 9508652.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25680590.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91250 + ... + 91530.

It is an arithmetic number, because the mean of its divisors is an integer number (843885).

Almost surely, 2^25680590 is an apocalyptic number.

25680590 is an abundant number, since it is smaller than the sum of its proper divisors (28328050).

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

25680590 is a wasteful number, since it uses less digits than its factorization.

25680590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 25680590 is about 5067.6019970002. The cubic root of 25680590 is about 295.0314626981.

The spelling of 25680590 in words is "twenty-five million, six hundred eighty thousand, five hundred ninety".