25490660 has 24 divisors (see below), whose sum is σ = 57648696. Its totient is φ = 9411840.

The previous prime is 25490657. The next prime is 25490671. The reversal of 25490660 is 6609452.

It can be written as a sum of positive squares in 4 ways, for example, as 1909924 + 23580736 = 1382^2 + 4856^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48761 + ... + 49280.

It is an arithmetic number, because the mean of its divisors is an integer number (2402029).

Almost surely, 2^25490660 is an apocalyptic number.

25490660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25490660 is an abundant number, since it is smaller than the sum of its proper divisors (32158036).

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

25490660 is a wasteful number, since it uses less digits than its factorization.

25490660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98063 (or 98061 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 25490660 is about 5048.8275866779. The cubic root of 25490660 is about 294.3023252544.

The spelling of 25490660 in words is "twenty-five million, four hundred ninety thousand, six hundred sixty".