1918244160 has 672 divisors, whose sum is σ = 8255934720. Its totient is φ = 417263616.

The previous prime is 1918244149. The next prime is 1918244171. The reversal of 1918244160 is 614428191.

It is an interprime number because it is at equal distance from previous prime (1918244149) and next prime (1918244171).

It is a tau number, because it is divible by the number of its divisors (672).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9737182 + ... + 9737378.

Almost surely, 2^1918244160 is an apocalyptic number.

1918244160 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 1918244160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4127967360).

1918244160 is an abundant number, since it is smaller than the sum of its proper divisors (6337690560).

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

1918244160 is a wasteful number, since it uses less digits than its factorization.

1918244160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1918244160 is about 43797.7643265042. The cubic root of 1918244160 is about 1242.5140116121.

The spelling of 1918244160 in words is "one billion, nine hundred eighteen million, two hundred forty-four thousand, one hundred sixty".