25028731 has 12 divisors (see below), whose sum is σ = 30975312. Its totient is φ = 19802016.

The previous prime is 25028723. The next prime is 25028741. The reversal of 25028731 is 13782052.

It is not a de Polignac number, because 25028731 - 2³ = 25028723 is a prime.

It is a super-2 number, since 2×25028731² = 1252874750940722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25028731.

It is not an unprimeable number, because it can be changed into a prime (25028741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9396 + ... + 11761.

It is an arithmetic number, because the mean of its divisors is an integer number (2581276).

Almost surely, 2^25028731 is an apocalyptic number.

25028731 is a deficient number, since it is larger than the sum of its proper divisors (5946581).

25028731 is a wasteful number, since it uses less digits than its factorization.

25028731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21190 (or 21177 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 25028731 is about 5002.8722750036. The cubic root of 25028731 is about 292.5137442101.

The spelling of 25028731 in words is "twenty-five million, twenty-eight thousand, seven hundred thirty-one".