197298990 has 144 divisors (see below), whose sum is σ = 619203312. Its totient is φ = 45069696.

The previous prime is 197298979. The next prime is 197299013. The reversal of 197298990 is 99892791.

197298990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 118242 + ... + 119898.

It is an arithmetic number, because the mean of its divisors is an integer number (4300023).

Almost surely, 2^197298990 is an apocalyptic number.

197298990 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 197298990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309601656).

197298990 is an abundant number, since it is smaller than the sum of its proper divisors (421904322).

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

197298990 is a wasteful number, since it uses less digits than its factorization.

197298990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693 (or 1674 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 54.

The square root of 197298990 is about 14046.3158870930. The cubic root of 197298990 is about 582.1590064003.

The spelling of 197298990 in words is "one hundred ninety-seven million, two hundred ninety-eight thousand, nine hundred ninety".