1994738172 has 48 divisors (see below), whose sum is σ = 5323664640. Its totient is φ = 569457792.

The previous prime is 1994738153. The next prime is 1994738189. The reversal of 1994738172 is 2718374991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100704 + ... + 118872.

It is an arithmetic number, because the mean of its divisors is an integer number (110909680).

Almost surely, 2^1994738172 is an apocalyptic number.

1994738172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1994738172 is an abundant number, since it is smaller than the sum of its proper divisors (3328926468).

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

1994738172 is a wasteful number, since it uses less digits than its factorization.

1994738172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19490 (or 19488 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The square root of 1994738172 is about 44662.4917800160. The cubic root of 1994738172 is about 1258.8151648546.

The spelling of 1994738172 in words is "one billion, nine hundred ninety-four million, seven hundred thirty-eight thousand, one hundred seventy-two".