197090850 has 72 divisors (see below), whose sum is σ = 537309360. Its totient is φ = 47775200.

The previous prime is 197090849. The next prime is 197090863. The reversal of 197090850 is 58090791.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 197090799 and 197090808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12721 + ... + 23579.

It is an arithmetic number, because the mean of its divisors is an integer number (7462630).

Almost surely, 2^197090850 is an apocalyptic number.

197090850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 197090850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268654680).

197090850 is an abundant number, since it is smaller than the sum of its proper divisors (340218510).

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

197090850 is a wasteful number, since it uses less digits than its factorization.

197090850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10896 (or 10880 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 197090850 is about 14038.9048718196. The cubic root of 197090850 is about 581.9542187155.

The spelling of 197090850 in words is "one hundred ninety-seven million, ninety thousand, eight hundred fifty".