1399340 has 48 divisors (see below), whose sum is σ = 3166464. Its totient is φ = 518400.

The previous prime is 1399319. The next prime is 1399351. The reversal of 1399340 is 439931.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22910 + ... + 22970.

It is an arithmetic number, because the mean of its divisors is an integer number (65968).

2^1399340 is an apocalyptic number.

1399340 is a gapful number since it is divisible by the number (10) 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 1399340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1583232).

1399340 is an abundant number, since it is smaller than the sum of its proper divisors (1767124).

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

1399340 is a wasteful number, since it uses less digits than its factorization.

1399340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 1399340 is about 1182.9370228376. The cubic root of 1399340 is about 111.8513120473.

The spelling of 1399340 in words is "one million, three hundred ninety-nine thousand, three hundred forty".