6428533 has 4 divisors (see below), whose sum is σ = 6806700. Its totient is φ = 6050368.

The previous prime is 6428489. The next prime is 6428551. The reversal of 6428533 is 3358246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3358246 = 2 ⋅1679123.

It can be written as a sum of positive squares in 2 ways, for example, as 4334724 + 2093809 = 2082^2 + 1447^2 .

It is not a de Polignac number, because 6428533 - 2²¹ = 4331381 is a prime.

It is a d-powerful number, because it can be written as 6 + 4¹⁰ + 2¹⁵ + 8⁵ + 5 + 3¹² + 3¹⁴ .

It is a Duffinian number.

6428533 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6428495 and 6428504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6428573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189058 + ... + 189091.

It is an arithmetic number, because the mean of its divisors is an integer number (1701675).

Almost surely, 2^6428533 is an apocalyptic number.

It is an amenable number.

6428533 is a deficient number, since it is larger than the sum of its proper divisors (378167).

6428533 is a wasteful number, since it uses less digits than its factorization.

6428533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378166.

The product of its digits is 17280, while the sum is 31.

The square root of 6428533 is about 2535.4551859577. The cubic root of 6428533 is about 185.9390577701.

The spelling of 6428533 in words is "six million, four hundred twenty-eight thousand, five hundred thirty-three".