618238830 has 128 divisors (see below), whose sum is σ = 1725774336. Its totient is φ = 140083200.

The previous prime is 618238811. The next prime is 618238837. The reversal of 618238830 is 38832816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618238837) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1082445 + ... + 1083015.

It is an arithmetic number, because the mean of its divisors is an integer number (13482612).

Almost surely, 2^618238830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618238830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (862887168).

618238830 is an abundant number, since it is smaller than the sum of its proper divisors (1107535506).

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

618238830 is a wasteful number, since it uses less digits than its factorization.

618238830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 618238830 is about 24864.4089010779. The cubic root of 618238830 is about 851.8937385385.

The spelling of 618238830 in words is "six hundred eighteen million, two hundred thirty-eight thousand, eight hundred thirty".