1378224 has 60 divisors (see below), whose sum is σ = 4091256. Its totient is φ = 431616.

The previous prime is 1378219. The next prime is 1378231. The reversal of 1378224 is 4228731.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2167 + ... + 2729.

2^1378224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2045628).

1378224 is an abundant number, since it is smaller than the sum of its proper divisors (2713032).

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

1378224 is a wasteful number, since it uses less digits than its factorization.

1378224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594 (or 585 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 1378224 is about 1173.9778532834. The cubic root of 1378224 is about 111.2858471359.

It can be divided in two parts, 1 and 378224, that added together give a square (378225 = 615²).

The spelling of 1378224 in words is "one million, three hundred seventy-eight thousand, two hundred twenty-four".