25524990 has 128 divisors (see below), whose sum is σ = 74027520. Its totient is φ = 6234624.

The previous prime is 25524977. The next prime is 25524991. The reversal of 25524990 is 9942552.

It is a happy number.

It is a super-2 number, since 2×25524990² = 1303050229000200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25524991) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 307489 + ... + 307571.

It is an arithmetic number, because the mean of its divisors is an integer number (578340).

Almost surely, 2^25524990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25524990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37013760).

25524990 is an abundant number, since it is smaller than the sum of its proper divisors (48502530).

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

25524990 is a wasteful number, since it uses less digits than its factorization.

25524990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 25524990 is about 5052.2262419650. The cubic root of 25524990 is about 294.4343849523.

The spelling of 25524990 in words is "twenty-five million, five hundred twenty-four thousand, nine hundred ninety".