197812980 has 72 divisors (see below), whose sum is σ = 601414632. Its totient is φ = 52628736.

The previous prime is 197812931. The next prime is 197812999. The reversal of 197812980 is 89218791.

It can be written as a sum of positive squares in 4 ways, for example, as 1028196 + 196784784 = 1014^2 + 14028^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99274 + ... + 101246.

It is an arithmetic number, because the mean of its divisors is an integer number (8352981).

Almost surely, 2^197812980 is an apocalyptic number.

197812980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197812980 is an abundant number, since it is smaller than the sum of its proper divisors (403601652).

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

197812980 is a wasteful number, since it uses less digits than its factorization.

197812980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545 (or 2540 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 197812980 is about 14064.6002431637. The cubic root of 197812980 is about 582.6641018121.

The spelling of 197812980 in words is "one hundred ninety-seven million, eight hundred twelve thousand, nine hundred eighty".