25438320 has 80 divisors (see below), whose sum is σ = 87628320. Its totient is φ = 6782976.

The previous prime is 25438319. The next prime is 25438337. The reversal of 25438320 is 2383452.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3729 + ... + 8048.

It is an arithmetic number, because the mean of its divisors is an integer number (1095354).

Almost surely, 2^25438320 is an apocalyptic number.

25438320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25438320 is an abundant number, since it is smaller than the sum of its proper divisors (62190000).

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

25438320 is a wasteful number, since it uses less digits than its factorization.

25438320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11799 (or 11787 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 25438320 is about 5043.6415415848. The cubic root of 25438320 is about 294.1007568026.

The spelling of 25438320 in words is "twenty-five million, four hundred thirty-eight thousand, three hundred twenty".