1220933646 has 12 divisors (see below), whose sum is σ = 2645356272. Its totient is φ = 406977876.

The previous prime is 1220933641. The next prime is 1220933647. The reversal of 1220933646 is 6463390221.

1220933646 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 9 + 3 + 3 + 646 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220933646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220933641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33914806 + ... + 33914841.

It is an arithmetic number, because the mean of its divisors is an integer number (220446356).

Almost surely, 2^1220933646 is an apocalyptic number.

1220933646 is an abundant number, since it is smaller than the sum of its proper divisors (1424422626).

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

1220933646 is a wasteful number, since it uses less digits than its factorization.

1220933646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67829655 (or 67829652 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 1220933646 is about 34941.8609407112. The cubic root of 1220933646 is about 1068.8022367410.

The spelling of 1220933646 in words is "one billion, two hundred twenty million, nine hundred thirty-three thousand, six hundred forty-six".