618438720 has 224 divisors, whose sum is σ = 2107070208. Its totient is φ = 153280512.

The previous prime is 618438719. The next prime is 618438731. The reversal of 618438720 is 27834816.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 816582 + ... + 817338.

Almost surely, 2^618438720 is an apocalyptic number.

618438720 is a gapful number since it is divisible by the number (60) 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 618438720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053535104).

618438720 is an abundant number, since it is smaller than the sum of its proper divisors (1488631488).

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

618438720 is a wasteful number, since it uses less digits than its factorization.

618438720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 827 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 618438720 is about 24868.4281771084. The cubic root of 618438720 is about 851.9855405424.

The spelling of 618438720 in words is "six hundred eighteen million, four hundred thirty-eight thousand, seven hundred twenty".