25498990 has 16 divisors (see below), whose sum is σ = 50070960. Its totient is φ = 9272320.

The previous prime is 25498981. The next prime is 25498999. The reversal of 25498990 is 9989452.

It is an interprime number because it is at equal distance from previous prime (25498981) and next prime (25498999).

It is a self number, because there is not a number n which added to its sum of digits gives 25498990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25498999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115795 + ... + 116014.

It is an arithmetic number, because the mean of its divisors is an integer number (3129435).

Almost surely, 2^25498990 is an apocalyptic number.

25498990 is a deficient number, since it is larger than the sum of its proper divisors (24571970).

25498990 is a wasteful number, since it uses less digits than its factorization.

25498990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231827.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 25498990 is about 5049.6524632889. The cubic root of 25498990 is about 294.3343797582.

The spelling of 25498990 in words is "twenty-five million, four hundred ninety-eight thousand, nine hundred ninety".