25390900 has 18 divisors (see below), whose sum is σ = 55098470. Its totient is φ = 10156320.

The previous prime is 25390853. The next prime is 25390901. The reversal of 25390900 is 909352.

It can be written as a sum of positive squares in 3 ways, for example, as 7717284 + 17673616 = 2778^2 + 4204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25390901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126855 + ... + 127054.

Almost surely, 2^25390900 is an apocalyptic number.

25390900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25390900 is an abundant number, since it is smaller than the sum of its proper divisors (29707570).

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

25390900 is a wasteful number, since it uses less digits than its factorization.

25390900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253923 (or 253916 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 25390900 is about 5038.9383802543. The cubic root of 25390900 is about 293.9178970764.

The spelling of 25390900 in words is "twenty-five million, three hundred ninety thousand, nine hundred".