1399678 has 16 divisors (see below), whose sum is σ = 2541024. Its totient is φ = 564480.

The previous prime is 1399663. The next prime is 1399679. The reversal of 1399678 is 8769931.

1399678 is nontrivially palindromic in base 6.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399679) 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, 2703 + ... + 3178.

It is an arithmetic number, because the mean of its divisors is an integer number (158814).

2^1399678 is an apocalyptic number.

1399678 is a deficient number, since it is larger than the sum of its proper divisors (1141346).

1399678 is a wasteful number, since it uses less digits than its factorization.

1399678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5907.

The product of its digits is 81648, while the sum is 43.

The square root of 1399678 is about 1183.0798789600. The cubic root of 1399678 is about 111.8603169353.

The spelling of 1399678 in words is "one million, three hundred ninety-nine thousand, six hundred seventy-eight".