196693638 has 16 divisors (see below), whose sum is σ = 416527920. Its totient is φ = 61707776.

The previous prime is 196693633. The next prime is 196693639. The reversal of 196693638 is 836396691.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196693633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964083 + ... + 964286.

It is an arithmetic number, because the mean of its divisors is an integer number (26032995).

Almost surely, 2^196693638 is an apocalyptic number.

196693638 is an abundant number, since it is smaller than the sum of its proper divisors (219834282).

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

196693638 is a wasteful number, since it uses less digits than its factorization.

196693638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928391.

The product of its digits is 1259712, while the sum is 51.

The square root of 196693638 is about 14024.7509068789. The cubic root of 196693638 is about 581.5630037605.

The spelling of 196693638 in words is "one hundred ninety-six million, six hundred ninety-three thousand, six hundred thirty-eight".