25728513 has 8 divisors (see below), whose sum is σ = 35796288. Its totient is φ = 16406544.

The previous prime is 25728487. The next prime is 25728523. The reversal of 25728513 is 31582752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25728513 - 2⁶ = 25728449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25728523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186370 + ... + 186507.

It is an arithmetic number, because the mean of its divisors is an integer number (4474536).

Almost surely, 2^25728513 is an apocalyptic number.

25728513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25728513 is a deficient number, since it is larger than the sum of its proper divisors (10067775).

25728513 is a wasteful number, since it uses less digits than its factorization.

25728513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372903.

The product of its digits is 16800, while the sum is 33.

The square root of 25728513 is about 5072.3281636740. The cubic root of 25728513 is about 295.2148697903.

The spelling of 25728513 in words is "twenty-five million, seven hundred twenty-eight thousand, five hundred thirteen".