1438478 has 4 divisors (see below), whose sum is σ = 2157720. Its totient is φ = 719238.

The previous prime is 1438477. The next prime is 1438483. The reversal of 1438478 is 8748341.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359618 + ... + 359621.

It is an arithmetic number, because the mean of its divisors is an integer number (539430).

2^1438478 is an apocalyptic number.

1438478 is a deficient number, since it is larger than the sum of its proper divisors (719242).

1438478 is an equidigital number, since it uses as much as digits as its factorization.

1438478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719241.

The product of its digits is 21504, while the sum is 35.

The square root of 1438478 is about 1199.3656656750. The cubic root of 1438478 is about 112.8845245286.

The spelling of 1438478 in words is "one million, four hundred thirty-eight thousand, four hundred seventy-eight".