1856984164 has 24 divisors (see below), whose sum is σ = 3789766400. Its totient is φ = 795849768.

The previous prime is 1856984159. The next prime is 1856984167. The reversal of 1856984164 is 4614896581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1856984167) 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, 675372 + ... + 678115.

Almost surely, 2^1856984164 is an apocalyptic number.

1856984164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1856984164 is an abundant number, since it is smaller than the sum of its proper divisors (1932782236).

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

1856984164 is a wasteful number, since it uses less digits than its factorization.

1856984164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353512 (or 1353496 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 52.

The square root of 1856984164 is about 43092.7391099707. The cubic root of 1856984164 is about 1229.1439091055.

The spelling of 1856984164 in words is "one billion, eight hundred fifty-six million, nine hundred eighty-four thousand, one hundred sixty-four".