1817444142 has 96 divisors (see below), whose sum is σ = 4185941760. Its totient is φ = 590820480.

The previous prime is 1817444141. The next prime is 1817444179. The reversal of 1817444142 is 2414447181.

1817444142 is a `hidden beast` number, since 1 + 8 + 174 + 441 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1817444097 and 1817444106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1817444141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6910303 + ... + 6910565.

It is an arithmetic number, because the mean of its divisors is an integer number (43603560).

Almost surely, 2^1817444142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1817444142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2092970880).

1817444142 is an abundant number, since it is smaller than the sum of its proper divisors (2368497618).

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

1817444142 is a wasteful number, since it uses less digits than its factorization.

1817444142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 568 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 1817444142 is about 42631.4923735963. The cubic root of 1817444142 is about 1220.3573579135.

The spelling of 1817444142 in words is "one billion, eight hundred seventeen million, four hundred forty-four thousand, one hundred forty-two".