25239998 has 16 divisors (see below), whose sum is σ = 44152800. Its totient is φ = 10816848.

The previous prime is 25239979. The next prime is 25240013. The reversal of 25239998 is 89993252.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 17711 + ... + 19082.

It is an arithmetic number, because the mean of its divisors is an integer number (2759550).

Almost surely, 2^25239998 is an apocalyptic number.

25239998 is a deficient number, since it is larger than the sum of its proper divisors (18912802).

25239998 is an equidigital number, since it uses as much as digits as its factorization.

25239998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36816 (or 36802 counting only the distinct ones).

The product of its digits is 349920, while the sum is 47.

The square root of 25239998 is about 5023.9424757853. The cubic root of 25239998 is about 293.3344734230.

It can be divided in two parts, 2523 and 9998, that added together give a palindrome (12521).

The spelling of 25239998 in words is "twenty-five million, two hundred thirty-nine thousand, nine hundred ninety-eight".