197798780 has 24 divisors (see below), whose sum is σ = 416624208. Its totient is φ = 78882048.

The previous prime is 197798779. The next prime is 197798789. The reversal of 197798780 is 87897791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197798789) 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, 7934 + ... + 21413.

It is an arithmetic number, because the mean of its divisors is an integer number (17359342).

Almost surely, 2^197798780 is an apocalyptic number.

197798780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197798780 is an abundant number, since it is smaller than the sum of its proper divisors (218825428).

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

197798780 is a wasteful number, since it uses less digits than its factorization.

197798780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29693 (or 29691 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 56.

The square root of 197798780 is about 14064.0954206092. The cubic root of 197798780 is about 582.6501593023.

The spelling of 197798780 in words is "one hundred ninety-seven million, seven hundred ninety-eight thousand, seven hundred eighty".