197090808 has 64 divisors (see below), whose sum is σ = 514053120. Its totient is φ = 62899200.

The previous prime is 197090797. The next prime is 197090827. The reversal of 197090808 is 808090791.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 197090808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70803 + ... + 73533.

It is an arithmetic number, because the mean of its divisors is an integer number (8032080).

Almost surely, 2^197090808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197090808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257026560).

197090808 is an abundant number, since it is smaller than the sum of its proper divisors (316962312).

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

197090808 is a wasteful number, since it uses less digits than its factorization.

197090808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868 (or 2864 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 197090808 is about 14038.9033759763. The cubic root of 197090808 is about 581.9541773774.

The spelling of 197090808 in words is "one hundred ninety-seven million, ninety thousand, eight hundred eight".