197622990 has 80 divisors (see below), whose sum is σ = 559397520. Its totient is φ = 49921920.

The previous prime is 197622989. The next prime is 197623001. The reversal of 197622990 is 99226791.

197622990 is a `hidden beast` number, since 19 + 7 + 622 + 9 + 9 + 0 = 666.

197622990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 39 ways as a sum of consecutive naturals, for example, 8970 + ... + 21810.

It is an arithmetic number, because the mean of its divisors is an integer number (6992469).

Almost surely, 2^197622990 is an apocalyptic number.

197622990 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 197622990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279698760).

197622990 is an abundant number, since it is smaller than the sum of its proper divisors (361774530).

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

197622990 is a wasteful number, since it uses less digits than its factorization.

197622990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12879 (or 12870 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 197622990 is about 14057.8444293569. The cubic root of 197622990 is about 582.4775016331.

The spelling of 197622990 in words is "one hundred ninety-seven million, six hundred twenty-two thousand, nine hundred ninety".