1399284 has 36 divisors (see below), whose sum is σ = 3616704. Its totient is φ = 455952.

The previous prime is 1399283. The next prime is 1399301. The reversal of 1399284 is 4829931.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1279 + ... + 2105.

It is an arithmetic number, because the mean of its divisors is an integer number (100464).

2^1399284 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 1399284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1808352).

1399284 is an abundant number, since it is smaller than the sum of its proper divisors (2217420).

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

1399284 is a wasteful number, since it uses less digits than its factorization.

1399284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 879 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 1399284 is about 1182.9133527017. The cubic root of 1399284 is about 111.8498199731.

The spelling of 1399284 in words is "one million, three hundred ninety-nine thousand, two hundred eighty-four".