1681834940 has 24 divisors (see below), whose sum is σ = 3645785472. Its totient is φ = 651032640.

The previous prime is 1681834933. The next prime is 1681834969. The reversal of 1681834940 is 494381861.

It is a junction number, because it is equal to n+sod(n) for n = 1681834891 and 1681834900.

It is a congruent number.

It is an unprimeable number.

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, 1355699 + ... + 1356938.

It is an arithmetic number, because the mean of its divisors is an integer number (151907728).

Almost surely, 2^1681834940 is an apocalyptic number.

1681834940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1681834940 is an abundant number, since it is smaller than the sum of its proper divisors (1963950532).

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

1681834940 is a wasteful number, since it uses less digits than its factorization.

1681834940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712677 (or 2712675 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 1681834940 is about 41010.1809310810. The cubic root of 1681834940 is about 1189.2170402225.

The spelling of 1681834940 in words is "one billion, six hundred eighty-one million, eight hundred thirty-four thousand, nine hundred forty".