197247990 has 32 divisors (see below), whose sum is σ = 479393280. Its totient is φ = 51933024.

The previous prime is 197247989. The next prime is 197247997. The reversal of 197247990 is 99742791.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197247997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39244 + ... + 43983.

It is an arithmetic number, because the mean of its divisors is an integer number (14981040).

Almost surely, 2^197247990 is an apocalyptic number.

197247990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197247990 is an abundant number, since it is smaller than the sum of its proper divisors (282145290).

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

197247990 is a wasteful number, since it uses less digits than its factorization.

197247990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83316.

The product of its (nonzero) digits is 285768, while the sum is 48.

The square root of 197247990 is about 14044.5003471110. The cubic root of 197247990 is about 582.1088411361.

The spelling of 197247990 in words is "one hundred ninety-seven million, two hundred forty-seven thousand, nine hundred ninety".