25765590 has 32 divisors (see below), whose sum is σ = 62298720. Its totient is φ = 6819584.

The previous prime is 25765561. The next prime is 25765609. The reversal of 25765590 is 9556752.

It is a congruent 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, 976 + ... + 7244.

It is an arithmetic number, because the mean of its divisors is an integer number (1946835).

Almost surely, 2^25765590 is an apocalyptic number.

25765590 is an abundant number, since it is smaller than the sum of its proper divisors (36533130).

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

25765590 is a wasteful number, since it uses less digits than its factorization.

25765590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6416.

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 25765590 is about 5075.9816784539. The cubic root of 25765590 is about 295.3566117303.

The spelling of 25765590 in words is "twenty-five million, seven hundred sixty-five thousand, five hundred ninety".