1390064 has 40 divisors (see below), whose sum is σ = 2989392. Its totient is φ = 622080.

The previous prime is 1390043. The next prime is 1390069. The reversal of 1390064 is 4600931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8447 + ... + 8609.

2^1390064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1494696).

1390064 is an abundant number, since it is smaller than the sum of its proper divisors (1599328).

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

1390064 is a wasteful number, since it uses less digits than its factorization.

1390064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1390064 is about 1179.0097539885. The cubic root of 1390064 is about 111.6036158008.

Subtracting from 1390064 its sum of digits (23), we obtain a square (1390041 = 1179²).

Adding to 1390064 its reverse (4600931), we get a palindrome (5990995).

The spelling of 1390064 in words is "one million, three hundred ninety thousand, sixty-four".