197789620 has 48 divisors (see below), whose sum is σ = 499685760. Its totient is φ = 64243584.

The previous prime is 197789609. The next prime is 197789659. The reversal of 197789620 is 26987791.

It is a happy number.

197789620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34519 + ... + 39838.

It is an arithmetic number, because the mean of its divisors is an integer number (10410120).

Almost surely, 2^197789620 is an apocalyptic number.

197789620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197789620 is an abundant number, since it is smaller than the sum of its proper divisors (301896140).

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

197789620 is a wasteful number, since it uses less digits than its factorization.

197789620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74392 (or 74390 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 197789620 is about 14063.7697648959. The cubic root of 197789620 is about 582.6411650476.

The spelling of 197789620 in words is "one hundred ninety-seven million, seven hundred eighty-nine thousand, six hundred twenty".