25878369 has 32 divisors (see below), whose sum is σ = 40241664. Its totient is φ = 14618880.

The previous prime is 25878337. The next prime is 25878379. The reversal of 25878369 is 96387852.

It is not a de Polignac number, because 25878369 - 2⁵ = 25878337 is a prime.

It is a super-2 number, since 2×25878369² = 1339379964200322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (25878319) 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, 91302 + ... + 91584.

It is an arithmetic number, because the mean of its divisors is an integer number (1257552).

Almost surely, 2^25878369 is an apocalyptic number.

It is an amenable number.

25878369 is a deficient number, since it is larger than the sum of its proper divisors (14363295).

25878369 is a wasteful number, since it uses less digits than its factorization.

25878369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477.

The product of its digits is 725760, while the sum is 48.

The square root of 25878369 is about 5087.0786311989. The cubic root of 25878369 is about 295.7869213090.

It can be divided in two parts, 258783 and 69, that added together give a palindrome (258852).

The spelling of 25878369 in words is "twenty-five million, eight hundred seventy-eight thousand, three hundred sixty-nine".