1816444152 has 48 divisors (see below), whose sum is σ = 5208924240. Its totient is φ = 569864448.

The previous prime is 1816444111. The next prime is 1816444171. The reversal of 1816444152 is 2514446181.

1816444152 is a `hidden beast` number, since 1 + 8 + 1 + 644 + 4 + 1 + 5 + 2 = 666.

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 11 ways as a sum of consecutive naturals, for example, 740788 + ... + 743235.

It is an arithmetic number, because the mean of its divisors is an integer number (108519255).

Almost surely, 2^1816444152 is an apocalyptic number.

1816444152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1816444152 is an abundant number, since it is smaller than the sum of its proper divisors (3392480088).

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

1816444152 is a wasteful number, since it uses less digits than its factorization.

1816444152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484052 (or 1484045 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 1816444152 is about 42619.7624582775. The cubic root of 1816444152 is about 1220.1334960969.

The spelling of 1816444152 in words is "one billion, eight hundred sixteen million, four hundred forty-four thousand, one hundred fifty-two".