197235228690 has 64 divisors (see below), whose sum is σ = 553642761600. Its totient is φ = 49827845952.

The previous prime is 197235228667. The next prime is 197235228691. The reversal of 197235228690 is 96822532791.

197235228690 is a `hidden beast` number, since 1 + 9 + 7 + 2 + 352 + 286 + 9 + 0 = 666.

It is a super-2 number, since 2×197235228690² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (197235228691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19218577 + ... + 19228836.

It is an arithmetic number, because the mean of its divisors is an integer number (8650668150).

Almost surely, 2^197235228690 is an apocalyptic number.

197235228690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197235228690 is an abundant number, since it is smaller than the sum of its proper divisors (356407532910).

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

197235228690 is a wasteful number, since it uses less digits than its factorization.

197235228690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38447448 (or 38447442 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 197235228690 in words is "one hundred ninety-seven billion, two hundred thirty-five million, two hundred twenty-eight thousand, six hundred ninety".