25704728 has 16 divisors (see below), whose sum is σ = 55081680. Its totient is φ = 11016288.

The previous prime is 25704727. The next prime is 25704737. The reversal of 25704728 is 82740752.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25704727) 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, 229451 + ... + 229562.

It is an arithmetic number, because the mean of its divisors is an integer number (3442605).

Almost surely, 2^25704728 is an apocalyptic number.

25704728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25704728 is an abundant number, since it is smaller than the sum of its proper divisors (29376952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25704728 is a wasteful number, since it uses less digits than its factorization.

25704728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459026 (or 459022 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 25704728 is about 5069.9830374470. The cubic root of 25704728 is about 295.1238702243.

The spelling of 25704728 in words is "twenty-five million, seven hundred four thousand, seven hundred twenty-eight".