618388992 has 400 divisors, whose sum is σ = 2107281792. Its totient is φ = 179159040.

The previous prime is 618388949. The next prime is 618388993. The reversal of 618388992 is 299883816.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618388993) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16713198 + ... + 16713234.

Almost surely, 2^618388992 is an apocalyptic number.

618388992 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618388992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053640896).

618388992 is an abundant number, since it is smaller than the sum of its proper divisors (1488892800).

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

618388992 is a wasteful number, since it uses less digits than its factorization.

618388992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 86 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 618388992 is about 24867.4283350732. The cubic root of 618388992 is about 851.9627041798.

The spelling of 618388992 in words is "six hundred eighteen million, three hundred eighty-eight thousand, nine hundred ninety-two".