25872990 has 128 divisors (see below), whose sum is σ = 75382272. Its totient is φ = 5598720.

The previous prime is 25872989. The next prime is 25872991. The reversal of 25872990 is 9927852.

It is an interprime number because it is at equal distance from previous prime (25872989) and next prime (25872991).

It is a super-2 number, since 2×25872990² = 1338823223080200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25872991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 158649 + ... + 158811.

It is an arithmetic number, because the mean of its divisors is an integer number (588924).

Almost surely, 2^25872990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25872990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37691136).

25872990 is an abundant number, since it is smaller than the sum of its proper divisors (49509282).

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

25872990 is a wasteful number, since it uses less digits than its factorization.

25872990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 25872990 is about 5086.5499112856. The cubic root of 25872990 is about 295.7664260954.

It can be divided in two parts, 25872 and 990, that added together give a palindrome (26862).

The spelling of 25872990 in words is "twenty-five million, eight hundred seventy-two thousand, nine hundred ninety".