25393920 has 144 divisors (see below), whose sum is σ = 86093280. Its totient is φ = 6356992.

The previous prime is 25393889. The next prime is 25393939. The reversal of 25393920 is 2939352.

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, 65086 + ... + 65474.

It is an arithmetic number, because the mean of its divisors is an integer number (597870).

Almost surely, 2^25393920 is an apocalyptic number.

25393920 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 25393920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43046640).

25393920 is an abundant number, since it is smaller than the sum of its proper divisors (60699360).

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

25393920 is a wasteful number, since it uses less digits than its factorization.

25393920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 33.

The square root of 25393920 is about 5039.2380376402. The cubic root of 25393920 is about 293.9295495038.

The spelling of 25393920 in words is "twenty-five million, three hundred ninety-three thousand, nine hundred twenty".