6278389 has 8 divisors (see below), whose sum is σ = 7159320. Its totient is φ = 5454336.

The previous prime is 6278381. The next prime is 6278407. The reversal of 6278389 is 9838726.

6278389 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 4 ways, for example, as 1034289 + 5244100 = 1017^2 + 2290^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6278389 - 2³ = 6278381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6278381) 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, 13984 + ... + 14425.

It is an arithmetic number, because the mean of its divisors is an integer number (894915).

Almost surely, 2^6278389 is an apocalyptic number.

It is an amenable number.

6278389 is a deficient number, since it is larger than the sum of its proper divisors (880931).

6278389 is a wasteful number, since it uses less digits than its factorization.

6278389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28439.

The product of its digits is 145152, while the sum is 43.

The square root of 6278389 is about 2505.6713671190. The cubic root of 6278389 is about 184.4800496442.

The spelling of 6278389 in words is "six million, two hundred seventy-eight thousand, three hundred eighty-nine".