25990500 has 48 divisors (see below), whose sum is σ = 75688704. Its totient is φ = 6930400.

The previous prime is 25990487. The next prime is 25990519. The reversal of 25990500 is 509952.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7164 + ... + 10163.

It is an arithmetic number, because the mean of its divisors is an integer number (1576848).

Almost surely, 2^25990500 is an apocalyptic number.

25990500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25990500 is an abundant number, since it is smaller than the sum of its proper divisors (49698204).

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

25990500 is a wasteful number, since it uses less digits than its factorization.

25990500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17349 (or 17337 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 25990500 is about 5098.0878768417. The cubic root of 25990500 is about 296.2135207624.

The spelling of 25990500 in words is "twenty-five million, nine hundred ninety thousand, five hundred".