197971290 has 160 divisors (see below), whose sum is σ = 615345984. Its totient is φ = 45135360.

The previous prime is 197971289. The next prime is 197971303. The reversal of 197971290 is 92179791.

It is a super-3 number, since 3×197971290³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 150817 + ... + 152123.

Almost surely, 2^197971290 is an apocalyptic number.

197971290 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 197971290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307672992).

197971290 is an abundant number, since it is smaller than the sum of its proper divisors (417374694).

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

197971290 is a wasteful number, since it uses less digits than its factorization.

197971290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354 (or 1345 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 45.

The square root of 197971290 is about 14070.2270770588. The cubic root of 197971290 is about 582.8194959928.

The spelling of 197971290 in words is "one hundred ninety-seven million, nine hundred seventy-one thousand, two hundred ninety".