253680720 has 40 divisors (see below), whose sum is σ = 786410976. Its totient is φ = 67648128.

The previous prime is 253680709. The next prime is 253680727. The reversal of 253680720 is 27086352.

It is a tau number, because it is divible by the number of its divisors (40).

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, 528262 + ... + 528741.

Almost surely, 2^253680720 is an apocalyptic number.

253680720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253680720 is an abundant number, since it is smaller than the sum of its proper divisors (532730256).

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

253680720 is a wasteful number, since it uses less digits than its factorization.

253680720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057019 (or 1057013 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 253680720 is about 15927.3575962870. The cubic root of 253680720 is about 633.0370864420.

The spelling of 253680720 in words is "two hundred fifty-three million, six hundred eighty thousand, seven hundred twenty".