25613900 has 144 divisors (see below), whose sum is σ = 67808160. Its totient is φ = 8294400.

The previous prime is 25613897. The next prime is 25613909. The reversal of 25613900 is 931652.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 25613900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25613909) 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, 419870 + ... + 419930.

It is an arithmetic number, because the mean of its divisors is an integer number (470890).

Almost surely, 2^25613900 is an apocalyptic number.

25613900 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 25613900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33904080).

25613900 is an abundant number, since it is smaller than the sum of its proper divisors (42194260).

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

25613900 is a wasteful number, since it uses less digits than its factorization.

25613900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 25613900 is about 5061.0176842212. The cubic root of 25613900 is about 294.7758519459.

The spelling of 25613900 in words is "twenty-five million, six hundred thirteen thousand, nine hundred".