196638940 has 12 divisors (see below), whose sum is σ = 412941816. Its totient is φ = 78655568.

The previous prime is 196638931. The next prime is 196638989. The reversal of 196638940 is 49836691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4915954 + ... + 4915993.

It is an arithmetic number, because the mean of its divisors is an integer number (34411818).

Almost surely, 2^196638940 is an apocalyptic number.

196638940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196638940 is an abundant number, since it is smaller than the sum of its proper divisors (216302876).

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

196638940 is a wasteful number, since it uses less digits than its factorization.

196638940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9831956 (or 9831954 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 196638940 is about 14022.8007188293. The cubic root of 196638940 is about 581.5090903368.

The spelling of 196638940 in words is "one hundred ninety-six million, six hundred thirty-eight thousand, nine hundred forty".