1390000 has 50 divisors (see below), whose sum is σ = 3389540. Its totient is φ = 552000.

The previous prime is 1389991. The next prime is 1390003. The reversal of 1390000 is 931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (50).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1390003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9931 + ... + 10069.

2^1390000 is an apocalyptic number.

1390000 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 1390000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1694770).

1390000 is an abundant number, since it is smaller than the sum of its proper divisors (1999540).

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

1390000 is an equidigital number, since it uses as much as digits as its factorization.

1390000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 1390000 is about 1178.9826122552. The cubic root of 1390000 is about 111.6019029921.

Adding to 1390000 its reverse (931), we get a palindrome (1390931).

The spelling of 1390000 in words is "one million, three hundred ninety thousand".