25945500 has 144 divisors (see below), whose sum is σ = 88137504. Its totient is φ = 5913600.

The previous prime is 25945483. The next prime is 25945501. The reversal of 25945500 is 554952.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25945501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73324 + ... + 73676.

It is an arithmetic number, because the mean of its divisors is an integer number (612066).

Almost surely, 2^25945500 is an apocalyptic number.

25945500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25945500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44068752).

25945500 is an abundant number, since it is smaller than the sum of its proper divisors (62192004).

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

25945500 is a wasteful number, since it uses less digits than its factorization.

25945500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 25945500 is about 5093.6725454234. The cubic root of 25945500 is about 296.0424671234.

The spelling of 25945500 in words is "twenty-five million, nine hundred forty-five thousand, five hundred".