25228857 has 16 divisors (see below), whose sum is σ = 34780032. Its totient is φ = 16254720.

The previous prime is 25228849. The next prime is 25228871. The reversal of 25228857 is 75882252.

It is a happy number.

It is not a de Polignac number, because 25228857 - 2³ = 25228849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25228837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17857 + ... + 19217.

It is an arithmetic number, because the mean of its divisors is an integer number (2173752).

Almost surely, 2^25228857 is an apocalyptic number.

It is an amenable number.

25228857 is a deficient number, since it is larger than the sum of its proper divisors (9551175).

25228857 is a wasteful number, since it uses less digits than its factorization.

25228857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568.

The product of its digits is 89600, while the sum is 39.

The square root of 25228857 is about 5022.8335628408. The cubic root of 25228857 is about 293.2913075410.

The spelling of 25228857 in words is "twenty-five million, two hundred twenty-eight thousand, eight hundred fifty-seven".