1220384 has 24 divisors (see below), whose sum is σ = 2621808. Its totient is φ = 554560.

The previous prime is 1220369. The next prime is 1220393. The reversal of 1220384 is 4830221.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1382 + ... + 2085.

It is an arithmetic number, because the mean of its divisors is an integer number (109242).

2^1220384 is an apocalyptic number.

It is an amenable number.

1220384 is an abundant number, since it is smaller than the sum of its proper divisors (1401424).

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

1220384 is a wasteful number, since it uses less digits than its factorization.

1220384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488 (or 3480 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1220384 is about 1104.7099166750. The cubic root of 1220384 is about 106.8641826426.

The spelling of 1220384 in words is "one million, two hundred twenty thousand, three hundred eighty-four".