6389604 has 120 divisors (see below), whose sum is σ = 18925368. Its totient is φ = 1866240.

The previous prime is 6389531. The next prime is 6389623. The reversal of 6389604 is 4069836.

It can be written as a sum of positive squares in 4 ways, for example, as 129600 + 6260004 = 360^2 + 2502^2 .

It is a super-4 number, since 4×6389604⁴ (a number of 28 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 155824 + ... + 155864.

Almost surely, 2^6389604 is an apocalyptic number.

6389604 is the 1599-th heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6389604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9462684).

6389604 is an abundant number, since it is smaller than the sum of its proper divisors (12535764).

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

6389604 is a wasteful number, since it uses less digits than its factorization.

6389604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6389604 is about 2527.7666031499. The cubic root of 6389604 is about 185.5629697849.

The spelling of 6389604 in words is "six million, three hundred eighty-nine thousand, six hundred four".