1853816838 has 16 divisors (see below), whose sum is σ = 3723969600. Its totient is φ = 615216296.

The previous prime is 1853816819. The next prime is 1853816843. The reversal of 1853816838 is 8386183581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679188 + ... + 681911.

It is an arithmetic number, because the mean of its divisors is an integer number (232748100).

Almost surely, 2^1853816838 is an apocalyptic number.

1853816838 is an abundant number, since it is smaller than the sum of its proper divisors (1870152762).

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

1853816838 is a wasteful number, since it uses less digits than its factorization.

1853816838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361331.

The product of its digits is 1105920, while the sum is 51.

The square root of 1853816838 is about 43055.9733138156. The cubic root of 1853816838 is about 1228.4446902627. Note that the first 3 decimals are identical.

The spelling of 1853816838 in words is "one billion, eight hundred fifty-three million, eight hundred sixteen thousand, eight hundred thirty-eight".