253380 has 48 divisors (see below), whose sum is σ = 733824. Its totient is φ = 65280.

The previous prime is 253369. The next prime is 253381. The reversal of 253380 is 83352.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (253381) by changing a digit.

253380 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2409 + ... + 2511.

It is an arithmetic number, because the mean of its divisors is an integer number (15288).

2²⁵³³⁸⁰ is an apocalyptic number.

253380 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 253380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366912).

253380 is an abundant number, since it is smaller than the sum of its proper divisors (480444).

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

253380 is a wasteful number, since it uses less digits than its factorization.

253380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 253380 is about 503.3686521825. The cubic root of 253380 is about 63.2786847764.

The spelling of 253380 in words is "two hundred fifty-three thousand, three hundred eighty".