1478638 has 16 divisors (see below), whose sum is σ = 2617344. Its totient is φ = 613080.

The previous prime is 1478627. The next prime is 1478639. The reversal of 1478638 is 8368741.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1478597 and 1478606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1478639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270 + ... + 2137.

It is an arithmetic number, because the mean of its divisors is an integer number (163584).

2^1478638 is an apocalyptic number.

1478638 is a deficient number, since it is larger than the sum of its proper divisors (1138706).

1478638 is a wasteful number, since it uses less digits than its factorization.

1478638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3447.

The product of its digits is 32256, while the sum is 37.

The square root of 1478638 is about 1215.9925986617. The cubic root of 1478638 is about 113.9254154591.

It can be divided in two parts, 1478 and 638, that added together give a square (2116 = 46²).

The spelling of 1478638 in words is "one million, four hundred seventy-eight thousand, six hundred thirty-eight".