1220384356 has 9 divisors (see below), whose sum is σ = 2135794899. Its totient is φ = 610157244.

The previous prime is 1220384353. The next prime is 1220384359. The reversal of 1220384356 is 6534830221.

The square root of 1220384356 is 34934.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (1220384353) and next prime (1220384359).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220384353) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 61135 + ... + 78601.

Almost surely, 2^1220384356 is an apocalyptic number.

1220384356 is the 34934-th square number.

It is an amenable number.

1220384356 is a deficient number, since it is larger than the sum of its proper divisors (915410543).

1220384356 is an frugal number, since it uses more digits than its factorization.

1220384356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34938 (or 17469 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The cubic root of 1220384356 is about 1068.6419303377.

The spelling of 1220384356 in words is "one billion, two hundred twenty million, three hundred eighty-four thousand, three hundred fifty-six".