1856763138 has 16 divisors (see below), whose sum is σ = 3726745056. Its totient is φ = 616717920.

The previous prime is 1856763131. The next prime is 1856763157. The reversal of 1856763138 is 8313676581.

It is not an unprimeable number, because it can be changed into a prime (1856763131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548956 + ... + 552327.

It is an arithmetic number, because the mean of its divisors is an integer number (232921566).

Almost surely, 2^1856763138 is an apocalyptic number.

1856763138 is an abundant number, since it is smaller than the sum of its proper divisors (1869981918).

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

1856763138 is a wasteful number, since it uses less digits than its factorization.

1856763138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101569.

The product of its digits is 725760, while the sum is 48.

The square root of 1856763138 is about 43090.1744948892. The cubic root of 1856763138 is about 1229.0951412259.

The spelling of 1856763138 in words is "one billion, eight hundred fifty-six million, seven hundred sixty-three thousand, one hundred thirty-eight".