1220406852 has 48 divisors (see below), whose sum is σ = 3295631360. Its totient is φ = 344272032.

The previous prime is 1220406839. The next prime is 1220406857. The reversal of 1220406852 is 2586040221.

1220406852 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1220406857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85318 + ... + 98589.

Almost surely, 2^1220406852 is an apocalyptic number.

1220406852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220406852 is an abundant number, since it is smaller than the sum of its proper divisors (2075224508).

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

1220406852 is a wasteful number, since it uses less digits than its factorization.

1220406852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184000 (or 183998 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 1220406852 is about 34934.3219771044. The cubic root of 1220406852 is about 1068.6484965808.

The spelling of 1220406852 in words is "one billion, two hundred twenty million, four hundred six thousand, eight hundred fifty-two".