1220945852 has 24 divisors (see below), whose sum is σ = 2570413440. Its totient is φ = 495722160.

The previous prime is 1220945821. The next prime is 1220945857. The reversal of 1220945852 is 2585490221.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220945857) 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, 1146974 + ... + 1148037.

It is an arithmetic number, because the mean of its divisors is an integer number (107100560).

Almost surely, 2^1220945852 is an apocalyptic number.

It is an amenable number.

1220945852 is an abundant number, since it is smaller than the sum of its proper divisors (1349467588).

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

1220945852 is a wasteful number, since it uses less digits than its factorization.

1220945852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295041 (or 2295039 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 1220945852 is about 34942.0356018364. The cubic root of 1220945852 is about 1068.8057984296.

The spelling of 1220945852 in words is "one billion, two hundred twenty million, nine hundred forty-five thousand, eight hundred fifty-two".