197979782 has 48 divisors (see below), whose sum is σ = 400972032. Its totient is φ = 71192160.

The previous prime is 197979763. The next prime is 197979787. The reversal of 197979782 is 287979791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197979787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22223 + ... + 29829.

It is an arithmetic number, because the mean of its divisors is an integer number (8353584).

Almost surely, 2^197979782 is an apocalyptic number.

197979782 is an abundant number, since it is smaller than the sum of its proper divisors (202992250).

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

197979782 is a wasteful number, since it uses less digits than its factorization.

197979782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7653 (or 7640 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 59.

The square root of 197979782 is about 14070.5288457826. The cubic root of 197979782 is about 582.8278292422.

Subtracting 197979782 from its reverse (287979791), we obtain a palindrome (90000009).

It can be divided in two parts, 197 and 979782, that added together give a palindrome (979979).

The spelling of 197979782 in words is "one hundred ninety-seven million, nine hundred seventy-nine thousand, seven hundred eighty-two".