25920867 has 32 divisors (see below), whose sum is σ = 42209280. Its totient is φ = 13829760.

The previous prime is 25920863. The next prime is 25920871. The reversal of 25920867 is 76802952.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25920863) and next prime (25920871).

It is not a de Polignac number, because 25920867 - 2² = 25920863 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (25920863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18193 + ... + 19565.

It is an arithmetic number, because the mean of its divisors is an integer number (1319040).

Almost surely, 2^25920867 is an apocalyptic number.

25920867 is a deficient number, since it is larger than the sum of its proper divisors (16288413).

25920867 is a wasteful number, since it uses less digits than its factorization.

25920867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 25920867 is about 5091.2539712727. The cubic root of 25920867 is about 295.9487485833.

The spelling of 25920867 in words is "twenty-five million, nine hundred twenty thousand, eight hundred sixty-seven".