6623398 has 16 divisors (see below), whose sum is σ = 10318464. Its totient is φ = 3185280.

The previous prime is 6623389. The next prime is 6623401. The reversal of 6623398 is 8933266.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19486 + ... + 19822.

It is an arithmetic number, because the mean of its divisors is an integer number (644904).

Almost surely, 2^6623398 is an apocalyptic number.

6623398 is a deficient number, since it is larger than the sum of its proper divisors (3695066).

6623398 is a wasteful number, since it uses less digits than its factorization.

6623398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687.

The product of its digits is 46656, while the sum is 37.

The square root of 6623398 is about 2573.5963164413. The cubic root of 6623398 is about 187.7991479503.

It can be divided in two parts, 6623 and 398, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 6623398 in words is "six million, six hundred twenty-three thousand, three hundred ninety-eight".