253544720 has 160 divisors (see below), whose sum is σ = 712454400. Its totient is φ = 82667520.

The previous prime is 253544719. The next prime is 253544737. The reversal of 253544720 is 27445352.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422981 + ... + 423579.

It is an arithmetic number, because the mean of its divisors is an integer number (4452840).

Almost surely, 2^253544720 is an apocalyptic number.

253544720 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 253544720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356227200).

253544720 is an abundant number, since it is smaller than the sum of its proper divisors (458909680).

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

253544720 is a wasteful number, since it uses less digits than its factorization.

253544720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 32.

The square root of 253544720 is about 15923.0876402788. The cubic root of 253544720 is about 632.9239410239.

The spelling of 253544720 in words is "two hundred fifty-three million, five hundred forty-four thousand, seven hundred twenty".