25728788 has 12 divisors (see below), whose sum is σ = 45275412. Its totient is φ = 12792960.

The previous prime is 25728721. The next prime is 25728809. The reversal of 25728788 is 88782752.

It can be written as a sum of positive squares in 2 ways, for example, as 8655364 + 17073424 = 2942^2 + 4132^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17045 + ... + 18492.

It is an arithmetic number, because the mean of its divisors is an integer number (3772951).

Almost surely, 2^25728788 is an apocalyptic number.

It is an amenable number.

25728788 is a deficient number, since it is larger than the sum of its proper divisors (19546624).

25728788 is a wasteful number, since it uses less digits than its factorization.

25728788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35722 (or 35720 counting only the distinct ones).

The product of its digits is 501760, while the sum is 47.

The square root of 25728788 is about 5072.3552714691. The cubic root of 25728788 is about 295.2159215909.

The spelling of 25728788 in words is "twenty-five million, seven hundred twenty-eight thousand, seven hundred eighty-eight".