25320490 has 64 divisors (see below), whose sum is σ = 51996672. Its totient is φ = 8812800.

The previous prime is 25320481. The next prime is 25320553. The reversal of 25320490 is 9402352.

It is a happy number.

It is a super-2 number, since 2×25320490² = 1282254427680200, which contains 22 as substring.

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, 245779 + ... + 245881.

It is an arithmetic number, because the mean of its divisors is an integer number (812448).

Almost surely, 2^25320490 is an apocalyptic number.

25320490 is an abundant number, since it is smaller than the sum of its proper divisors (26676182).

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

25320490 is a wasteful number, since it uses less digits than its factorization.

25320490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 25320490 is about 5031.9469393069. The cubic root of 25320490 is about 293.6459634598.

The spelling of 25320490 in words is "twenty-five million, three hundred twenty thousand, four hundred ninety".