25728338 has 8 divisors (see below), whose sum is σ = 38616588. Its totient is φ = 12856144.

The previous prime is 25728331. The next prime is 25728347. The reversal of 25728338 is 83382752.

It can be written as a sum of positive squares in 2 ways, for example, as 20857489 + 4870849 = 4567^2 + 2207^2 .

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

It is not an unprimeable number, because it can be changed into a prime (25728331) 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, 1520 + ... + 7332.

Almost surely, 2^25728338 is an apocalyptic number.

25728338 is a deficient number, since it is larger than the sum of its proper divisors (12888250).

25728338 is a wasteful number, since it uses less digits than its factorization.

25728338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8028.

The product of its digits is 80640, while the sum is 38.

The square root of 25728338 is about 5072.3109131835. The cubic root of 25728338 is about 295.2142004587.

The spelling of 25728338 in words is "twenty-five million, seven hundred twenty-eight thousand, three hundred thirty-eight".