25500090 has 192 divisors, whose sum is σ = 82736640. Its totient is φ = 4959360.

The previous prime is 25500089. The next prime is 25500091. The reversal of 25500090 is 9000552.

It is an interprime number because it is at equal distance from previous prime (25500089) and next prime (25500091).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25500091) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 307189 + ... + 307271.

It is an arithmetic number, because the mean of its divisors is an integer number (430920).

Almost surely, 2^25500090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25500090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41368320).

25500090 is an abundant number, since it is smaller than the sum of its proper divisors (57236550).

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

25500090 is a wasteful number, since it uses less digits than its factorization.

25500090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 25500090 is about 5049.7613805011. The cubic root of 25500090 is about 294.3386121241.

The spelling of 25500090 in words is "twenty-five million, five hundred thousand, ninety".