196579640 has 32 divisors (see below), whose sum is σ = 447282000. Its totient is φ = 77746944.

The previous prime is 196579639. The next prime is 196579673. The reversal of 196579640 is 46975691.

196579640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24050 + ... + 31169.

Almost surely, 2^196579640 is an apocalyptic number.

196579640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196579640 is an abundant number, since it is smaller than the sum of its proper divisors (250702360).

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

196579640 is a wasteful number, since it uses less digits than its factorization.

196579640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55319 (or 55315 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 196579640 is about 14020.6861458347. The cubic root of 196579640 is about 581.4506296270.

The spelling of 196579640 in words is "one hundred ninety-six million, five hundred seventy-nine thousand, six hundred forty".