1854638156 has 12 divisors (see below), whose sum is σ = 3709276368. Its totient is φ = 794844912.

The previous prime is 1854638111. The next prime is 1854638173. The reversal of 1854638156 is 6518364581.

1854638156 is an admirable number.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1854638156.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33118511 + ... + 33118566.

It is an arithmetic number, because the mean of its divisors is an integer number (309106364).

Almost surely, 2^1854638156 is an apocalyptic number.

It is an amenable number.

1854638156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1854638156 is a wasteful number, since it uses less digits than its factorization.

1854638156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66237088 (or 66237086 counting only the distinct ones).

The product of its digits is 691200, while the sum is 47.

The square root of 1854638156 is about 43065.5100515482. The cubic root of 1854638156 is about 1228.6260808493.

The spelling of 1854638156 in words is "one billion, eight hundred fifty-four million, six hundred thirty-eight thousand, one hundred fifty-six".