25728238 has 16 divisors (see below), whose sum is σ = 39717216. Its totient is φ = 12492160.

The previous prime is 25728229. The next prime is 25728247. The reversal of 25728238 is 83282752.

It is an interprime number because it is at equal distance from previous prime (25728229) and next prime (25728247).

It is a junction number, because it is equal to n+sod(n) for n = 25728197 and 25728206.

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, 20970 + ... + 22162.

It is an arithmetic number, because the mean of its divisors is an integer number (2482326).

Almost surely, 2^25728238 is an apocalyptic number.

25728238 is a deficient number, since it is larger than the sum of its proper divisors (13988978).

25728238 is a wasteful number, since it uses less digits than its factorization.

25728238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499.

The product of its digits is 53760, while the sum is 37.

The square root of 25728238 is about 5072.3010557340. The cubic root of 25728238 is about 295.2138179821.

The spelling of 25728238 in words is "twenty-five million, seven hundred twenty-eight thousand, two hundred thirty-eight".