253320870 has 64 divisors (see below), whose sum is σ = 681198336. Its totient is φ = 59748480.

The previous prime is 253320853. The next prime is 253320911. The reversal of 253320870 is 78023352.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 1837 + ... + 22583.

It is an arithmetic number, because the mean of its divisors is an integer number (10643724).

Almost surely, 2^253320870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253320870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340599168).

253320870 is an abundant number, since it is smaller than the sum of its proper divisors (427877466).

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

253320870 is a wasteful number, since it uses less digits than its factorization.

253320870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20805.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 253320870 is about 15916.0569865781. The cubic root of 253320870 is about 632.7376205197.

It can be divided in two parts, 253 and 320870, that added together give a palindrome (321123).

The spelling of 253320870 in words is "two hundred fifty-three million, three hundred twenty thousand, eight hundred seventy".