197638042 has 16 divisors (see below), whose sum is σ = 339007680. Its totient is φ = 84652128.

The previous prime is 197638027. The next prime is 197638061. The reversal of 197638042 is 240836791.

It is a super-3 number, since 3×197638042³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 197637986 and 197638004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30309 + ... + 36247.

It is an arithmetic number, because the mean of its divisors is an integer number (21187980).

Almost surely, 2^197638042 is an apocalyptic number.

197638042 is a deficient number, since it is larger than the sum of its proper divisors (141369638).

197638042 is a wasteful number, since it uses less digits than its factorization.

197638042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8325.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 197638042 is about 14058.3797786231. The cubic root of 197638042 is about 582.4922894348.

The spelling of 197638042 in words is "one hundred ninety-seven million, six hundred thirty-eight thousand, forty-two".