197838885 has 8 divisors (see below), whose sum is σ = 316542240. Its totient is φ = 105514064.

The previous prime is 197838863. The next prime is 197838917. The reversal of 197838885 is 588838791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 197838885 - 2⁵ = 197838853 is a prime.

It is a super-4 number, since 4×197838885⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6594615 + ... + 6594644.

It is an arithmetic number, because the mean of its divisors is an integer number (39567780).

Almost surely, 2^197838885 is an apocalyptic number.

197838885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197838885 is a deficient number, since it is larger than the sum of its proper divisors (118703355).

197838885 is a wasteful number, since it uses less digits than its factorization.

197838885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13189267.

The product of its digits is 3870720, while the sum is 57.

The square root of 197838885 is about 14065.5211421405. The cubic root of 197838885 is about 582.6895353550.

The spelling of 197838885 in words is "one hundred ninety-seven million, eight hundred thirty-eight thousand, eight hundred eighty-five".