25256400 has 120 divisors (see below), whose sum is σ = 87181920. Its totient is φ = 6213120.

The previous prime is 25256383. The next prime is 25256431. The reversal of 25256400 is 465252.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14791 + ... + 16409.

It is an arithmetic number, because the mean of its divisors is an integer number (726516).

Almost surely, 2^25256400 is an apocalyptic number.

25256400 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 25256400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43590960).

25256400 is an abundant number, since it is smaller than the sum of its proper divisors (61925520).

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

25256400 is a wasteful number, since it uses less digits than its factorization.

25256400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 25256400 is about 5025.5745940141. The cubic root of 25256400 is about 293.3979999761.

The spelling of 25256400 in words is "twenty-five million, two hundred fifty-six thousand, four hundred".