253147830 has 128 divisors (see below), whose sum is σ = 696729600. Its totient is φ = 58351104.

The previous prime is 253147823. The next prime is 253147841. The reversal of 253147830 is 38741352.

It is a junction number, because it is equal to n+sod(n) for n = 253147791 and 253147800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 940936 + ... + 941204.

It is an arithmetic number, because the mean of its divisors is an integer number (5443200).

Almost surely, 2^253147830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253147830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (348364800).

253147830 is an abundant number, since it is smaller than the sum of its proper divisors (443581770).

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

253147830 is a wasteful number, since it uses less digits than its factorization.

253147830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438.

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

The square root of 253147830 is about 15910.6200382009. The cubic root of 253147830 is about 632.5935162493.

The spelling of 253147830 in words is "two hundred fifty-three million, one hundred forty-seven thousand, eight hundred thirty".