1859994144 has 192 divisors, whose sum is σ = 5646775680. Its totient is φ = 595123200.

The previous prime is 1859994133. The next prime is 1859994193. The reversal of 1859994144 is 4414999581.

1859994144 is a `hidden beast` number, since 1 + 8 + 599 + 9 + 4 + 1 + 44 = 666.

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 31 ways as a sum of consecutive naturals, for example, 2652994 + ... + 2653694.

It is an arithmetic number, because the mean of its divisors is an integer number (29410290).

Almost surely, 2^1859994144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1859994144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2823387840).

1859994144 is an abundant number, since it is smaller than the sum of its proper divisors (3786781536).

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

1859994144 is a wasteful number, since it uses less digits than its factorization.

1859994144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840 (or 826 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 1859994144 is about 43127.6494142679. The cubic root of 1859994144 is about 1229.8076558245.

The spelling of 1859994144 in words is "one billion, eight hundred fifty-nine million, nine hundred ninety-four thousand, one hundred forty-four".