25813990 has 16 divisors (see below), whose sum is σ = 49198752. Its totient is φ = 9718144.

The previous prime is 25813937. The next prime is 25813999. The reversal of 25813990 is 9931852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25813999) 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, 75754 + ... + 76093.

It is an arithmetic number, because the mean of its divisors is an integer number (3074922).

Almost surely, 2^25813990 is an apocalyptic number.

25813990 is a deficient number, since it is larger than the sum of its proper divisors (23384762).

25813990 is a wasteful number, since it uses less digits than its factorization.

25813990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151871.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 25813990 is about 5080.7469923231. The cubic root of 25813990 is about 295.5414359894.

The spelling of 25813990 in words is "twenty-five million, eight hundred thirteen thousand, nine hundred ninety".