1918348320 has 96 divisors (see below), whose sum is σ = 6906066048. Its totient is φ = 438478848.

The previous prime is 1918348309. The next prime is 1918348331. The reversal of 1918348320 is 238438191.

It is an interprime number because it is at equal distance from previous prime (1918348309) and next prime (1918348331).

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282109 + ... + 288828.

It is an arithmetic number, because the mean of its divisors is an integer number (71938188).

Almost surely, 2^1918348320 is an apocalyptic number.

1918348320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1918348320 is an abundant number, since it is smaller than the sum of its proper divisors (4987717728).

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

1918348320 is a wasteful number, since it uses less digits than its factorization.

1918348320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570962 (or 570954 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 1918348320 is about 43798.9534121536. The cubic root of 1918348320 is about 1242.5365005667.

The spelling of 1918348320 in words is "one billion, nine hundred eighteen million, three hundred forty-eight thousand, three hundred twenty".