161883798 has 64 divisors (see below), whose sum is σ = 353894400. Its totient is φ = 49214880.

The previous prime is 161883793. The next prime is 161883811. The reversal of 161883798 is 897388161.

It is a self number, because there is not a number n which added to its sum of digits gives 161883798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161883793) 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 31 ways as a sum of consecutive naturals, for example, 337723 + ... + 338201.

It is an arithmetic number, because the mean of its divisors is an integer number (5529600).

Almost surely, 2^161883798 is an apocalyptic number.

161883798 is an abundant number, since it is smaller than the sum of its proper divisors (192010602).

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

161883798 is a wasteful number, since it uses less digits than its factorization.

161883798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617.

The product of its digits is 580608, while the sum is 51.

The square root of 161883798 is about 12723.3563968003. The cubic root of 161883798 is about 545.0058052856.

The spelling of 161883798 in words is "one hundred sixty-one million, eight hundred eighty-three thousand, seven hundred ninety-eight".