25739728 has 20 divisors (see below), whose sum is σ = 56995360. Its totient is φ = 11031264.

The previous prime is 25739719. The next prime is 25739729. The reversal of 25739728 is 82793752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25739729) 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, 114798 + ... + 115021.

It is an arithmetic number, because the mean of its divisors is an integer number (2849768).

Almost surely, 2^25739728 is an apocalyptic number.

25739728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25739728 is an abundant number, since it is smaller than the sum of its proper divisors (31255632).

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

25739728 is a wasteful number, since it uses less digits than its factorization.

25739728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229834 (or 229828 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 25739728 is about 5073.4335513536. The cubic root of 25739728 is about 295.2577580548.

The spelling of 25739728 in words is "twenty-five million, seven hundred thirty-nine thousand, seven hundred twenty-eight".