1918914480 has 360 divisors, whose sum is σ = 7580430000. Its totient is φ = 433714176.

The previous prime is 1918914479. The next prime is 1918914497. The reversal of 1918914480 is 844198191.

1918914480 is a `hidden beast` number, since 1 + 91 + 89 + 1 + 4 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3845271 + ... + 3845769.

It is an arithmetic number, because the mean of its divisors is an integer number (21056750).

Almost surely, 2^1918914480 is an apocalyptic number.

1918914480 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 1918914480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3790215000).

1918914480 is an abundant number, since it is smaller than the sum of its proper divisors (5661515520).

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

1918914480 is a wasteful number, since it uses less digits than its factorization.

1918914480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 625 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 1918914480 is about 43805.4161034911. The cubic root of 1918914480 is about 1242.6587246807.

The spelling of 1918914480 in words is "one billion, nine hundred eighteen million, nine hundred fourteen thousand, four hundred eighty".