196391664 has 240 divisors, whose sum is σ = 674099712. Its totient is φ = 52157952.

The previous prime is 196391647. The next prime is 196391669. The reversal of 196391664 is 466193691.

196391664 is a `hidden beast` number, since 1 + 9 + 639 + 1 + 6 + 6 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196391669) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 996814 + ... + 997010.

Almost surely, 2^196391664 is an apocalyptic number.

196391664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196391664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337049856).

196391664 is an abundant number, since it is smaller than the sum of its proper divisors (477708048).

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

196391664 is a wasteful number, since it uses less digits than its factorization.

196391664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 275 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 196391664 is about 14013.9810189682. The cubic root of 196391664 is about 581.2652363679.

The spelling of 196391664 in words is "one hundred ninety-six million, three hundred ninety-one thousand, six hundred sixty-four".