1438306 has 4 divisors (see below), whose sum is σ = 2157462. Its totient is φ = 719152.

The previous prime is 1438303. The next prime is 1438379. The reversal of 1438306 is 6038341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 731025 + 707281 = 855^2 + 841^2 .

It is not an unprimeable number, because it can be changed into a prime (1438303) 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 as a sum of consecutive naturals, namely, 359575 + ... + 359578.

2^1438306 is an apocalyptic number.

1438306 is the 759-th centered pentagonal number.

1438306 is a deficient number, since it is larger than the sum of its proper divisors (719156).

1438306 is an equidigital number, since it uses as much as digits as its factorization.

1438306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719155.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1438306 is about 1199.2939589609. The cubic root of 1438306 is about 112.8800251173.

The spelling of 1438306 in words is "one million, four hundred thirty-eight thousand, three hundred six".