42016728 has 32 divisors (see below), whose sum is σ = 113122800. Its totient is φ = 12928128.

The previous prime is 42016721. The next prime is 42016747. The reversal of 42016728 is 82761024.

It is a junction number, because it is equal to n+sod(n) for n = 42016695 and 42016704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42016721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67023 + ... + 67646.

Almost surely, 2^42016728 is an apocalyptic number.

It is an amenable number.

42016728 is an abundant number, since it is smaller than the sum of its proper divisors (71106072).

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

42016728 is a wasteful number, since it uses less digits than its factorization.

42016728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134691 (or 134687 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 42016728 is about 6482.0311631463. The cubic root of 42016728 is about 347.6488067551.

The spelling of 42016728 in words is "forty-two million, sixteen thousand, seven hundred twenty-eight".