196634638 has 4 divisors (see below), whose sum is σ = 294951960. Its totient is φ = 98317318.

The previous prime is 196634623. The next prime is 196634639. The reversal of 196634638 is 836436691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836436691 = 4783 ⋅174877.

It is a super-2 number, since 2×196634638² = 77330361722782088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196634639) by changing a digit.

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 as a sum of consecutive naturals, namely, 49158658 + ... + 49158661.

It is an arithmetic number, because the mean of its divisors is an integer number (73737990).

Almost surely, 2^196634638 is an apocalyptic number.

196634638 is a deficient number, since it is larger than the sum of its proper divisors (98317322).

196634638 is an equidigital number, since it uses as much as digits as its factorization.

196634638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98317321.

The product of its digits is 559872, while the sum is 46.

The square root of 196634638 is about 14022.6473249526. The cubic root of 196634638 is about 581.5048496197.

The spelling of 196634638 in words is "one hundred ninety-six million, six hundred thirty-four thousand, six hundred thirty-eight".