25929728 has 48 divisors (see below), whose sum is σ = 56609280. Its totient is φ = 11776000.

The previous prime is 25929727. The next prime is 25929751. The reversal of 25929728 is 82792952.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25929727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21953 + ... + 23103.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360).

Almost surely, 2^25929728 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 25929728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28304640).

25929728 is an abundant number, since it is smaller than the sum of its proper divisors (30679552).

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

25929728 is a wasteful number, since it uses less digits than its factorization.

25929728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184 (or 1164 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 25929728 is about 5092.1241147482. The cubic root of 25929728 is about 295.9824679170.

The spelling of 25929728 in words is "twenty-five million, nine hundred twenty-nine thousand, seven hundred twenty-eight".