1865938842 has 40 divisors (see below), whose sum is σ = 4222519092. Its totient is φ = 615816000.

The previous prime is 1865938831. The next prime is 1865938843. The reversal of 1865938842 is 2488395681.

1865938842 is a `hidden beast` number, since 1 + 8 + 6 + 593 + 8 + 8 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1857696201 + 8242641 = 43101^2 + 2871^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1865938843) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40659 + ... + 73382.

Almost surely, 2^1865938842 is an apocalyptic number.

1865938842 is an abundant number, since it is smaller than the sum of its proper divisors (2356580250).

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

1865938842 is a wasteful number, since it uses less digits than its factorization.

1865938842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114156 (or 114147 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 1865938842 is about 43196.5142343685. The cubic root of 1865938842 is about 1231.1164521011.

The spelling of 1865938842 in words is "one billion, eight hundred sixty-five million, nine hundred thirty-eight thousand, eight hundred forty-two".