1438506 has 32 divisors (see below), whose sum is σ = 3386880. Its totient is φ = 451008.

The previous prime is 1438501. The next prime is 1438517. The reversal of 1438506 is 6058341.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1438506.

It is not an unprimeable number, because it can be changed into a prime (1438501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135 + ... + 1701.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

2^1438506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1438506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1693440).

1438506 is an abundant number, since it is smaller than the sum of its proper divisors (1948374).

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

1438506 is a wasteful number, since it uses less digits than its factorization.

1438506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1438506 is about 1199.3773384553. The cubic root of 1438506 is about 112.8852569569.

It can be divided in two parts, 143 and 8506, that added together give a square (8649 = 93²).

The spelling of 1438506 in words is "one million, four hundred thirty-eight thousand, five hundred six".