1984145868 has 60 divisors (see below), whose sum is σ = 5327169232. Its totient is φ = 643502880.

The previous prime is 1984145819. The next prime is 1984145881. The reversal of 1984145868 is 8685414891.

It is a happy number.

1984145868 is a `hidden beast` number, since 1 + 98 + 41 + 458 + 68 = 666.

1984145868 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 70768 + ... + 94743.

Almost surely, 2^1984145868 is an apocalyptic number.

1984145868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1984145868 is an abundant number, since it is smaller than the sum of its proper divisors (3343023364).

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

1984145868 is a wasteful number, since it uses less digits than its factorization.

1984145868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165564 (or 165553 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The square root of 1984145868 is about 44543.7522891819. The cubic root of 1984145868 is about 1256.5830550213.

The spelling of 1984145868 in words is "one billion, nine hundred eighty-four million, one hundred forty-five thousand, eight hundred sixty-eight".