199880980 has 24 divisors (see below), whose sum is σ = 452039112. Its totient is φ = 73802112.

The previous prime is 199880977. The next prime is 199880983. The reversal of 199880980 is 89088991.

It is an interprime number because it is at equal distance from previous prime (199880977) and next prime (199880983).

It can be written as a sum of positive squares in 4 ways, for example, as 6170256 + 193710724 = 2484^2 + 13918^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199880983) 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, 384127 + ... + 384646.

It is an arithmetic number, because the mean of its divisors is an integer number (18834963).

Almost surely, 2^199880980 is an apocalyptic number.

199880980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199880980 is an abundant number, since it is smaller than the sum of its proper divisors (252158132).

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

199880980 is a wasteful number, since it uses less digits than its factorization.

199880980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768795 (or 768793 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 52.

The square root of 199880980 is about 14137.9270050457. The cubic root of 199880980 is about 584.6875190929.

The spelling of 199880980 in words is "one hundred ninety-nine million, eight hundred eighty thousand, nine hundred eighty".