1918297080 has 480 divisors, whose sum is σ = 7702017840. Its totient is φ = 426746880.

The previous prime is 1918297061. The next prime is 1918297093. The reversal of 1918297080 is 807928191.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 6826540 + ... + 6826820.

Almost surely, 2^1918297080 is an apocalyptic number.

1918297080 is a gapful number since it is divisible by the number (10) 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 1918297080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3851008920).

1918297080 is an abundant number, since it is smaller than the sum of its proper divisors (5783720760).

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

1918297080 is a wasteful number, since it uses less digits than its factorization.

1918297080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 1918297080 is about 43798.3684627635. The cubic root of 1918297080 is about 1242.5254375537.

The spelling of 1918297080 in words is "one billion, nine hundred eighteen million, two hundred ninety-seven thousand, eighty".