918342720 has 168 divisors, whose sum is σ = 3344701464. Its totient is φ = 230473728.

The previous prime is 918342709. The next prime is 918342727. The reversal of 918342720 is 27243819.

It can be written as a sum of positive squares in 4 ways, for example, as 226442304 + 691900416 = 15048^2 + 26304^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (918342727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39582 + ... + 58338.

Almost surely, 2^918342720 is an apocalyptic number.

918342720 is a gapful number since it is divisible by the number (90) 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 918342720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1672350732).

918342720 is an abundant number, since it is smaller than the sum of its proper divisors (2426358744).

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

918342720 is a wasteful number, since it uses less digits than its factorization.

918342720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18797 (or 18784 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 918342720 is about 30304.1700100828. The cubic root of 918342720 is about 972.0044708426.

The spelling of 918342720 in words is "nine hundred eighteen million, three hundred forty-two thousand, seven hundred twenty".