1399432 has 8 divisors (see below), whose sum is σ = 2623950. Its totient is φ = 699712.

The previous prime is 1399427. The next prime is 1399439. The reversal of 1399432 is 2349931.

It can be written as a sum of positive squares in only one way, i.e., 872356 + 527076 = 934^2 + 726^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1399394 and 1399403.

It is not an unprimeable number, because it can be changed into a prime (1399439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87457 + ... + 87472.

2^1399432 is an apocalyptic number.

It is an amenable number.

1399432 is a deficient number, since it is larger than the sum of its proper divisors (1224518).

1399432 is a wasteful number, since it uses less digits than its factorization.

1399432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174935 (or 174931 counting only the distinct ones).

The product of its digits is 5832, while the sum is 31.

The square root of 1399432 is about 1182.9759084614. The cubic root of 1399432 is about 111.8537632255.

The spelling of 1399432 in words is "one million, three hundred ninety-nine thousand, four hundred thirty-two".