196857381 has 16 divisors (see below), whose sum is σ = 301088768. Its totient is φ = 112071600.

The previous prime is 196857373. The next prime is 196857439. The reversal of 196857381 is 183758691.

It is not a de Polignac number, because 196857381 - 2³ = 196857373 is a prime.

It is a super-2 number, since 2×196857381² = 77505656908358322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196857381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196857301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11605 + ... + 22986.

It is an arithmetic number, because the mean of its divisors is an integer number (18818048).

Almost surely, 2^196857381 is an apocalyptic number.

It is an amenable number.

196857381 is a deficient number, since it is larger than the sum of its proper divisors (104231387).

196857381 is a wasteful number, since it uses less digits than its factorization.

196857381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34872.

The product of its digits is 362880, while the sum is 48.

The square root of 196857381 is about 14030.5873362451. The cubic root of 196857381 is about 581.7243383438.

The spelling of 196857381 in words is "one hundred ninety-six million, eight hundred fifty-seven thousand, three hundred eighty-one".