1399400 has 24 divisors (see below), whose sum is σ = 3254070. Its totient is φ = 559680.

The previous prime is 1399399. The next prime is 1399403. The reversal of 1399400 is 49931.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 917764 + 481636 = 958^2 + 694^2 .

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 1399400.

It is not an unprimeable number, because it can be changed into a prime (1399403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3299 + ... + 3698.

2^1399400 is an apocalyptic number.

1399400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1399400 is an abundant number, since it is smaller than the sum of its proper divisors (1854670).

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

1399400 is a wasteful number, since it uses less digits than its factorization.

1399400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7013 (or 7004 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1399400 is about 1182.9623831720. The cubic root of 1399400 is about 111.8529106540.

The spelling of 1399400 in words is "one million, three hundred ninety-nine thousand, four hundred".