6428736 has 42 divisors (see below), whose sum is σ = 18428462. Its totient is φ = 2142720.

The previous prime is 6428731. The next prime is 6428743. The reversal of 6428736 is 6378246.

6428736 is a `hidden beast` number, since 642 + 8 + 7 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3686400 + 2742336 = 1920^2 + 1656^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 6428736.

It is not an unprimeable number, because it can be changed into a prime (6428731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5005 + ... + 6156.

Almost surely, 2^6428736 is an apocalyptic number.

It is an amenable number.

6428736 is an abundant number, since it is smaller than the sum of its proper divisors (11999726).

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

6428736 is a wasteful number, since it uses less digits than its factorization.

6428736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11179 (or 11166 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 6428736 is about 2535.4952179012. The cubic root of 6428736 is about 185.9410149419.

The spelling of 6428736 in words is "six million, four hundred twenty-eight thousand, seven hundred thirty-six".