25929864 has 48 divisors (see below), whose sum is σ = 71089200. Its totient is φ = 8537184.

The previous prime is 25929833. The next prime is 25929881. The reversal of 25929864 is 46892952.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3807 + ... + 8145.

It is an arithmetic number, because the mean of its divisors is an integer number (1481025).

Almost surely, 2^25929864 is an apocalyptic number.

25929864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25929864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35544600).

25929864 is an abundant number, since it is smaller than the sum of its proper divisors (45159336).

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

25929864 is a wasteful number, since it uses less digits than its factorization.

25929864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4434 (or 4427 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 25929864 is about 5092.1374686864. The cubic root of 25929864 is about 295.9829853867.

The spelling of 25929864 in words is "twenty-five million, nine hundred twenty-nine thousand, eight hundred sixty-four".