1681084998 has 24 divisors (see below), whose sum is σ = 3654074736. Its totient is φ = 558558000.

The previous prime is 1681084991. The next prime is 1681085009. The reversal of 1681084998 is 8994801861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681084991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144553 + ... + 155748.

It is an arithmetic number, because the mean of its divisors is an integer number (152253114).

Almost surely, 2^1681084998 is an apocalyptic number.

1681084998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1681084998 is an abundant number, since it is smaller than the sum of its proper divisors (1972989738).

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

1681084998 is a wasteful number, since it uses less digits than its factorization.

1681084998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300620 (or 300617 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The square root of 1681084998 is about 41001.0365478728. The cubic root of 1681084998 is about 1189.0402538691.

The spelling of 1681084998 in words is "one billion, six hundred eighty-one million, eighty-four thousand, nine hundred ninety-eight".