618661230 has 64 divisors (see below), whose sum is σ = 1624866048. Its totient is φ = 149506560.

The previous prime is 618661217. The next prime is 618661231. The reversal of 618661230 is 32166816.

It is a super-2 number, since 2×618661230² = 765483435010225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 618661191 and 618661200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618661231) 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, 108429 + ... + 113991.

It is an arithmetic number, because the mean of its divisors is an integer number (25388532).

Almost surely, 2^618661230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618661230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812433024).

618661230 is an abundant number, since it is smaller than the sum of its proper divisors (1006204818).

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

618661230 is a wasteful number, since it uses less digits than its factorization.

618661230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 618661230 is about 24872.9015195252. The cubic root of 618661230 is about 852.0877078038.

The spelling of 618661230 in words is "six hundred eighteen million, six hundred sixty-one thousand, two hundred thirty".