197197830 has 24 divisors (see below), whose sum is σ = 512714592. Its totient is φ = 52586064.

The previous prime is 197197801. The next prime is 197197843. The reversal of 197197830 is 38791791.

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 11 ways as a sum of consecutive naturals, for example, 1095454 + ... + 1095633.

It is an arithmetic number, because the mean of its divisors is an integer number (21363108).

Almost surely, 2^197197830 is an apocalyptic number.

197197830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197197830 is an abundant number, since it is smaller than the sum of its proper divisors (315516762).

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

197197830 is a wasteful number, since it uses less digits than its factorization.

197197830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191100 (or 2191097 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 45.

The square root of 197197830 is about 14042.7144811820. The cubic root of 197197830 is about 582.0594936879.

The spelling of 197197830 in words is "one hundred ninety-seven million, one hundred ninety-seven thousand, eight hundred thirty".