25728732 has 24 divisors (see below), whose sum is σ = 66704400. Its totient is φ = 8576208.

The previous prime is 25728721. The next prime is 25728809. The reversal of 25728732 is 23782752.

It is a happy number.

25728732 is a `hidden beast` number, since 2 + 572 + 87 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119007 + ... + 119222.

It is an arithmetic number, because the mean of its divisors is an integer number (2779350).

Almost surely, 2^25728732 is an apocalyptic number.

It is an amenable number.

25728732 is an abundant number, since it is smaller than the sum of its proper divisors (40975668).

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

25728732 is a wasteful number, since it uses less digits than its factorization.

25728732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238242 (or 238234 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 25728732 is about 5072.3497513480. The cubic root of 25728732 is about 295.2157074067.

The spelling of 25728732 in words is "twenty-five million, seven hundred twenty-eight thousand, seven hundred thirty-two".