5278638 has 32 divisors (see below), whose sum is σ = 11404800. Its totient is φ = 1623776.

The previous prime is 5278621. The next prime is 5278657. The reversal of 5278638 is 8368725.

It is a junction number, because it is equal to n+sod(n) for n = 5278596 and 5278605.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 3343 + ... + 4661.

It is an arithmetic number, because the mean of its divisors is an integer number (356400).

Almost surely, 2^5278638 is an apocalyptic number.

5278638 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

5278638 is an abundant number, since it is smaller than the sum of its proper divisors (6126162).

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

5278638 is a wasteful number, since it uses less digits than its factorization.

5278638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376.

The product of its digits is 80640, while the sum is 39.

The square root of 5278638 is about 2297.5286722912. The cubic root of 5278638 is about 174.1167798434.

The spelling of 5278638 in words is "five million, two hundred seventy-eight thousand, six hundred thirty-eight".