253684780 has 72 divisors (see below), whose sum is σ = 561529584. Its totient is φ = 96243840.

The previous prime is 253684771. The next prime is 253684793. The reversal of 253684780 is 87486352.

253684780 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1287642 + ... + 1287838.

It is an arithmetic number, because the mean of its divisors is an integer number (7799022).

Almost surely, 2^253684780 is an apocalyptic number.

253684780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253684780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280764792).

253684780 is an abundant number, since it is smaller than the sum of its proper divisors (307844804).

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

253684780 is a wasteful number, since it uses less digits than its factorization.

253684780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 253684780 is about 15927.4850494358. The cubic root of 253684780 is about 633.0404635438.

The spelling of 253684780 in words is "two hundred fifty-three million, six hundred eighty-four thousand, seven hundred eighty".