1438458 has 32 divisors (see below), whose sum is σ = 3404160. Its totient is φ = 396480.

The previous prime is 1438457. The next prime is 1438477. The reversal of 1438458 is 8548341.

It is a super-2 number, since 2×1438458² = 4138322835528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1438457) 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, 628 + ... + 1808.

It is an arithmetic number, because the mean of its divisors is an integer number (106380).

2^1438458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1438458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1702080).

1438458 is an abundant number, since it is smaller than the sum of its proper divisors (1965702).

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

1438458 is a wasteful number, since it uses less digits than its factorization.

1438458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222.

The product of its digits is 15360, while the sum is 33.

The square root of 1438458 is about 1199.3573279052. The cubic root of 1438458 is about 112.8840013596.

The spelling of 1438458 in words is "one million, four hundred thirty-eight thousand, four hundred fifty-eight".