6428538 has 16 divisors (see below), whose sum is σ = 14285760. Its totient is φ = 2142828.

The previous prime is 6428489. The next prime is 6428551. The reversal of 6428538 is 8358246.

6428538 is a `hidden beast` number, since 642 + 8 + 5 + 3 + 8 = 666.

It is a super-2 number, since 2×6428538² = 82652201634888, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6⁵ + 4⁸ + 2²² + 8⁴ + 5⁴ + 3¹⁰ + 8⁷ .

It is a Curzon 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, 59470 + ... + 59577.

It is an arithmetic number, because the mean of its divisors is an integer number (892860).

Almost surely, 2^6428538 is an apocalyptic number.

6428538 is an abundant number, since it is smaller than the sum of its proper divisors (7857222).

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

6428538 is a wasteful number, since it uses less digits than its factorization.

6428538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119058 (or 119052 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 6428538 is about 2535.4561719738. The cubic root of 6428538 is about 185.9391059768.

It can be divided in two parts, 642 and 8538, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 6428538 in words is "six million, four hundred twenty-eight thousand, five hundred thirty-eight".