25786864 has 40 divisors (see below), whose sum is σ = 52853760. Its totient is φ = 12163008.

The previous prime is 25786853. The next prime is 25786883. The reversal of 25786864 is 46868752.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28629 + ... + 29515.

It is an arithmetic number, because the mean of its divisors is an integer number (1321344).

Almost surely, 2^25786864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25786864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26426880).

25786864 is an abundant number, since it is smaller than the sum of its proper divisors (27066896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25786864 is a wasteful number, since it uses less digits than its factorization.

25786864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997 (or 991 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The square root of 25786864 is about 5078.0768013097. The cubic root of 25786864 is about 295.4378788777.

The spelling of 25786864 in words is "twenty-five million, seven hundred eighty-six thousand, eight hundred sixty-four".