25111990 has 32 divisors (see below), whose sum is σ = 46391616. Its totient is φ = 9784320.

The previous prime is 25111987. The next prime is 25112027. The reversal of 25111990 is 9911152.

It is a super-2 number, since 2×25111990² = 1261224083520200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80074 + ... + 80386.

It is an arithmetic number, because the mean of its divisors is an integer number (1449738).

Almost surely, 2^25111990 is an apocalyptic number.

25111990 is a deficient number, since it is larger than the sum of its proper divisors (21279626).

25111990 is a wasteful number, since it uses less digits than its factorization.

25111990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504.

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 25111990 is about 5011.1864862525. The cubic root of 25111990 is about 292.8377378151.

The spelling of 25111990 in words is "twenty-five million, one hundred eleven thousand, nine hundred ninety".