25031328 has 72 divisors (see below), whose sum is σ = 75485088. Its totient is φ = 7114752.

The previous prime is 25031323. The next prime is 25031333. The reversal of 25031328 is 82313052.

It is an interprime number because it is at equal distance from previous prime (25031323) and next prime (25031333).

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

It is a junction number, because it is equal to n+sod(n) for n = 25031298 and 25031307.

It is not an unprimeable number, because it can be changed into a prime (25031323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129600 + ... + 129792.

It is an arithmetic number, because the mean of its divisors is an integer number (1048404).

Almost surely, 2^25031328 is an apocalyptic number.

25031328 is a gapful number since it is divisible by the number (28) 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 25031328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37742544).

25031328 is an abundant number, since it is smaller than the sum of its proper divisors (50453760).

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

25031328 is an equidigital number, since it uses as much as digits as its factorization.

25031328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 25031328 is about 5003.1318191709. The cubic root of 25031328 is about 292.5238610091.

The spelling of 25031328 in words is "twenty-five million, thirty-one thousand, three hundred twenty-eight".