25238728 has 32 divisors (see below), whose sum is σ = 50083200. Its totient is φ = 11899008.

The previous prime is 25238713. The next prime is 25238737. The reversal of 25238728 is 82783252.

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, 12493 + ... + 14371.

It is an arithmetic number, because the mean of its divisors is an integer number (1565100).

Almost surely, 2^25238728 is an apocalyptic number.

It is an amenable number.

25238728 is a deficient number, since it is larger than the sum of its proper divisors (24844472).

25238728 is a wasteful number, since it uses less digits than its factorization.

25238728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981 (or 1977 counting only the distinct ones).

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

The square root of 25238728 is about 5023.8160794360. The cubic root of 25238728 is about 293.3295534407.

Multiplying 25238728 by its sum of digits (37), we get a triangular number (933832936 = T₄₃₂₁₆).

The spelling of 25238728 in words is "twenty-five million, two hundred thirty-eight thousand, seven hundred twenty-eight".