1439004 has 48 divisors (see below), whose sum is σ = 3949568. Its totient is φ = 399168.

The previous prime is 1438993. The next prime is 1439017. The reversal of 1439004 is 4009341.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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, 2877 + ... + 3339.

2^1439004 is an apocalyptic number.

1439004 is a gapful number since it is divisible by the number (14) 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 1439004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1974784).

1439004 is an abundant number, since it is smaller than the sum of its proper divisors (2510564).

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

1439004 is a wasteful number, since it uses less digits than its factorization.

1439004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1439004 is about 1199.5849282148. The cubic root of 1439004 is about 112.8982821307.

The spelling of 1439004 in words is "one million, four hundred thirty-nine thousand, four".