1438889 has 4 divisors (see below), whose sum is σ = 1514640. Its totient is φ = 1363140.

The previous prime is 1438883. The next prime is 1438891. The reversal of 1438889 is 9888341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1438889 - 2¹² = 1434793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1438883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37847 + ... + 37884.

It is an arithmetic number, because the mean of its divisors is an integer number (378660).

2^1438889 is an apocalyptic number.

1438889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1438889 is a deficient number, since it is larger than the sum of its proper divisors (75751).

1438889 is an equidigital number, since it uses as much as digits as its factorization.

1438889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75750.

The product of its digits is 55296, while the sum is 41.

The square root of 1438889 is about 1199.5369940106. The cubic root of 1438889 is about 112.8952745763.

It can be divided in two parts, 14 and 38889, that multiplied together give a triangular number (544446 = T₁₀₄₃).

The spelling of 1438889 in words is "one million, four hundred thirty-eight thousand, eight hundred eighty-nine".