1390344 has 32 divisors (see below), whose sum is σ = 3660000. Its totient is φ = 438912.

The previous prime is 1390343. The next prime is 1390357. The reversal of 1390344 is 4430931.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1390343) 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, 1069 + ... + 1980.

It is an arithmetic number, because the mean of its divisors is an integer number (114375).

2^1390344 is an apocalyptic number.

It is an amenable number.

1390344 is an abundant number, since it is smaller than the sum of its proper divisors (2269656).

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

1390344 is a wasteful number, since it uses less digits than its factorization.

1390344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077 (or 3073 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1390344 is about 1179.1284917260. The cubic root of 1390344 is about 111.6111087206.

The spelling of 1390344 in words is "one million, three hundred ninety thousand, three hundred forty-four".