253680728 has 32 divisors (see below), whose sum is σ = 551266560. Its totient is φ = 107187360.

The previous prime is 253680727. The next prime is 253680773. The reversal of 253680728 is 827086352.

It is a Smith number, since the sum of its digits (41) 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 (253680727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27926 + ... + 35877.

It is an arithmetic number, because the mean of its divisors is an integer number (17227080).

Almost surely, 2^253680728 is an apocalyptic number.

253680728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

253680728 is an abundant number, since it is smaller than the sum of its proper divisors (297585832).

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

253680728 is a wasteful number, since it uses less digits than its factorization.

253680728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63887 (or 63883 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 253680728 is about 15927.3578474272. The cubic root of 253680728 is about 633.0370930964.

The spelling of 253680728 in words is "two hundred fifty-three million, six hundred eighty thousand, seven hundred twenty-eight".