618556230 has 64 divisors (see below), whose sum is σ = 1668081600. Its totient is φ = 163088640.

The previous prime is 618556207. The next prime is 618556231. The reversal of 618556230 is 32655816.

618556230 is a `hidden beast` number, since 61 + 8 + 5 + 562 + 30 = 666.

It is a super-2 number, since 2×618556230² = 765223619343625800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618556231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11160 + ... + 36900.

It is an arithmetic number, because the mean of its divisors is an integer number (26063775).

Almost surely, 2^618556230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618556230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (834040800).

618556230 is an abundant number, since it is smaller than the sum of its proper divisors (1049525370).

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

618556230 is a wasteful number, since it uses less digits than its factorization.

618556230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25846 (or 25840 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 618556230 is about 24870.7906991314. The cubic root of 618556230 is about 852.0394992598.

The spelling of 618556230 in words is "six hundred eighteen million, five hundred fifty-six thousand, two hundred thirty".