196634640 has 40 divisors (see below), whose sum is σ = 609568128. Its totient is φ = 52435840.

The previous prime is 196634639. The next prime is 196634653. The reversal of 196634640 is 46436691.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409416 + ... + 409895.

Almost surely, 2^196634640 is an apocalyptic number.

196634640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196634640 is an abundant number, since it is smaller than the sum of its proper divisors (412933488).

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

196634640 is a wasteful number, since it uses less digits than its factorization.

196634640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819327 (or 819321 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 196634640 is about 14022.6473962658. The cubic root of 196634640 is about 581.5048515912.

The spelling of 196634640 in words is "one hundred ninety-six million, six hundred thirty-four thousand, six hundred forty".