1980045798 has 16 divisors (see below), whose sum is σ = 4044349440. Its totient is φ = 645972296.

The previous prime is 1980045797. The next prime is 1980045839. The reversal of 1980045798 is 8975400891.

It is a self number, because there is not a number n which added to its sum of digits gives 1980045798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980045791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3510438 + ... + 3511001.

It is an arithmetic number, because the mean of its divisors is an integer number (252771840).

Almost surely, 2^1980045798 is an apocalyptic number.

1980045798 is an abundant number, since it is smaller than the sum of its proper divisors (2064303642).

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

1980045798 is a wasteful number, since it uses less digits than its factorization.

1980045798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021491.

The product of its (nonzero) digits is 725760, while the sum is 51.

The square root of 1980045798 is about 44497.7055363532. The cubic root of 1980045798 is about 1255.7169171989.

The spelling of 1980045798 in words is "one billion, nine hundred eighty million, forty-five thousand, seven hundred ninety-eight".