25978831 has 8 divisors (see below), whose sum is σ = 26386304. Its totient is φ = 25574400.

The previous prime is 25978817. The next prime is 25978861. The reversal of 25978831 is 13887952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25978831 - 2¹³ = 25970639 is a prime.

It is a super-2 number, since 2×25978831² = 1349799320253122, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25978861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21031 + ... + 22231.

It is an arithmetic number, because the mean of its divisors is an integer number (3298288).

Almost surely, 2^25978831 is an apocalyptic number.

25978831 is a deficient number, since it is larger than the sum of its proper divisors (407473).

25978831 is a wasteful number, since it uses less digits than its factorization.

25978831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521.

The product of its digits is 120960, while the sum is 43.

The square root of 25978831 is about 5096.9432996650. The cubic root of 25978831 is about 296.1691836264.

The spelling of 25978831 in words is "twenty-five million, nine hundred seventy-eight thousand, eight hundred thirty-one".