25291328 has 28 divisors (see below), whose sum is σ = 50566320. Its totient is φ = 12550272.

The previous prime is 25291327. The next prime is 25291349. The reversal of 25291328 is 82319252.

It is a happy number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 25291294 and 25291303.

It is not an unprimeable number, because it can be changed into a prime (25291327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7475 + ... + 10317.

It is an arithmetic number, because the mean of its divisors is an integer number (1805940).

Almost surely, 2^25291328 is an apocalyptic number.

It is an amenable number.

25291328 is a deficient number, since it is larger than the sum of its proper divisors (25274992).

25291328 is a wasteful number, since it uses less digits than its factorization.

25291328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994 (or 2984 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 25291328 is about 5029.0484189357. The cubic root of 25291328 is about 293.5331879542.

The spelling of 25291328 in words is "twenty-five million, two hundred ninety-one thousand, three hundred twenty-eight".