25887969 has 12 divisors (see below), whose sum is σ = 37472292. Its totient is φ = 17222400.

The previous prime is 25887947. The next prime is 25887971. The reversal of 25887969 is 96978852.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7354944 + 18533025 = 2712^2 + 4305^2 .

It is not a de Polignac number, because 25887969 - 2¹¹ = 25885921 is a prime.

It is a super-2 number, since 2×25887969² = 1340373877889922, which contains 22 as substring.

Its product of digits (2177280) is a multiple of the sum of its prime factors (6048).

It is not an unprimeable number, because it can be changed into a prime (25887919) 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, 1929 + ... + 7449.

It is an arithmetic number, because the mean of its divisors is an integer number (3122691).

Almost surely, 2^25887969 is an apocalyptic number.

It is an amenable number.

25887969 is a deficient number, since it is larger than the sum of its proper divisors (11584323).

25887969 is a wasteful number, since it uses less digits than its factorization.

25887969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6048 (or 6045 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 25887969 is about 5088.0221108010. The cubic root of 25887969 is about 295.8234924364.

The spelling of 25887969 in words is "twenty-five million, eight hundred eighty-seven thousand, nine hundred sixty-nine".