1399638 has 16 divisors (see below), whose sum is σ = 2810880. Its totient is φ = 464616.

The previous prime is 1399633. The next prime is 1399639. The reversal of 1399638 is 8369931.

It is a junction number, because it is equal to n+sod(n) for n = 1399596 and 1399605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399633) 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, 2631 + ... + 3117.

It is an arithmetic number, because the mean of its divisors is an integer number (175680).

2^1399638 is an apocalyptic number.

1399638 is an abundant number, since it is smaller than the sum of its proper divisors (1411242).

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

1399638 is a wasteful number, since it uses less digits than its factorization.

1399638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971.

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

The square root of 1399638 is about 1183.0629738099. The cubic root of 1399638 is about 111.8592513437.

The spelling of 1399638 in words is "one million, three hundred ninety-nine thousand, six hundred thirty-eight".