42028428 has 24 divisors (see below), whose sum is σ = 105610288. Its totient is φ = 12931776.

The previous prime is 42028391. The next prime is 42028433. The reversal of 42028428 is 82482024.

It is a junction number, because it is equal to n+sod(n) for n = 42028395 and 42028404.

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, 134551 + ... + 134862.

Almost surely, 2^42028428 is an apocalyptic number.

It is an amenable number.

42028428 is an abundant number, since it is smaller than the sum of its proper divisors (63581860).

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

42028428 is a wasteful number, since it uses less digits than its factorization.

42028428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269433 (or 269431 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 30.

The square root of 42028428 is about 6482.9335952175. The cubic root of 42028428 is about 347.6810725831.

The spelling of 42028428 in words is "forty-two million, twenty-eight thousand, four hundred twenty-eight".