1831994334 has 80 divisors (see below), whose sum is σ = 4221225360. Its totient is φ = 593619840.

The previous prime is 1831994323. The next prime is 1831994369. The reversal of 1831994334 is 4334991381.

It is a self number, because there is not a number n which added to its sum of digits gives 1831994334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 878457 + ... + 880539.

It is an arithmetic number, because the mean of its divisors is an integer number (52765317).

Almost surely, 2^1831994334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1831994334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2110612680).

1831994334 is an abundant number, since it is smaller than the sum of its proper divisors (2389231026).

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

1831994334 is a wasteful number, since it uses less digits than its factorization.

1831994334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2247 (or 2238 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 1831994334 is about 42801.8029293160. The cubic root of 1831994334 is about 1223.6053730713.

The spelling of 1831994334 in words is "one billion, eight hundred thirty-one million, nine hundred ninety-four thousand, three hundred thirty-four".