1399944 has 64 divisors (see below), whose sum is σ = 4314240. Its totient is φ = 368640.

The previous prime is 1399943. The next prime is 1399963. The reversal of 1399944 is 4499931.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1399943) 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, 1864 + ... + 2504.

It is an arithmetic number, because the mean of its divisors is an integer number (67410).

2^1399944 is an apocalyptic number.

1399944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1399944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2157120).

1399944 is an abundant number, since it is smaller than the sum of its proper divisors (2914296).

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

1399944 is a wasteful number, since it uses less digits than its factorization.

1399944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 666 counting only the distinct ones).

The product of its digits is 34992, while the sum is 39.

The square root of 1399944 is about 1183.1922920641. The cubic root of 1399944 is about 111.8674026030.

The spelling of 1399944 in words is "one million, three hundred ninety-nine thousand, nine hundred forty-four".