196821612 has 72 divisors (see below), whose sum is σ = 543875696. Its totient is φ = 59647104.

The previous prime is 196821601. The next prime is 196821613. The reversal of 196821612 is 216128691.

196821612 is a `hidden beast` number, since 19 + 6 + 8 + 21 + 612 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (196821613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28218 + ... + 34494.

Almost surely, 2^196821612 is an apocalyptic number.

196821612 is a gapful number since it is divisible by the number (12) 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 196821612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271937848).

196821612 is an abundant number, since it is smaller than the sum of its proper divisors (347054084).

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

196821612 is a wasteful number, since it uses less digits than its factorization.

196821612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6367 (or 6362 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 196821612 is about 14029.3125989836. The cubic root of 196821612 is about 581.6891030919.

The spelling of 196821612 in words is "one hundred ninety-six million, eight hundred twenty-one thousand, six hundred twelve".