197787642 has 32 divisors (see below), whose sum is σ = 427871808. Its totient is φ = 60590976.

The previous prime is 197787631. The next prime is 197787671. The reversal of 197787642 is 246787791.

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, 12733 + ... + 23615.

It is an arithmetic number, because the mean of its divisors is an integer number (13370994).

Almost surely, 2^197787642 is an apocalyptic number.

197787642 is an abundant number, since it is smaller than the sum of its proper divisors (230084166).

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

197787642 is a wasteful number, since it uses less digits than its factorization.

197787642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11134.

The product of its digits is 1185408, while the sum is 51.

The square root of 197787642 is about 14063.6994421809. The cubic root of 197787642 is about 582.6392228019.

The spelling of 197787642 in words is "one hundred ninety-seven million, seven hundred eighty-seven thousand, six hundred forty-two".