196821744 has 40 divisors (see below), whose sum is σ = 581093760. Its totient is φ = 56234688.

The previous prime is 196821743. The next prime is 196821749. The reversal of 196821744 is 447128691.

It is a super-2 number, since 2×196821744² = 77477597822403072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 196821696 and 196821705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196821743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292554 + ... + 293225.

It is an arithmetic number, because the mean of its divisors is an integer number (14527344).

Almost surely, 2^196821744 is an apocalyptic number.

196821744 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

196821744 is an abundant number, since it is smaller than the sum of its proper divisors (384272016).

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

196821744 is a wasteful number, since it uses less digits than its factorization.

196821744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585797 (or 585791 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 196821744 is about 14029.3173034186. The cubic root of 196821744 is about 581.6892331301.

The spelling of 196821744 in words is "one hundred ninety-six million, eight hundred twenty-one thousand, seven hundred forty-four".