42028868 has 18 divisors (see below), whose sum is σ = 85559166. Its totient is φ = 18012288.

The previous prime is 42028853. The next prime is 42028871. The reversal of 42028868 is 86882024.

It can be written as a sum of positive squares in only one way, i.e., 42016324 + 12544 = 6482^2 + 112^2 .

It is a super-2 number, since 2×42028868² = 3532851490722848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107021 + ... + 107412.

It is an arithmetic number, because the mean of its divisors is an integer number (4753287).

Almost surely, 2^42028868 is an apocalyptic number.

It is an amenable number.

42028868 is an abundant number, since it is smaller than the sum of its proper divisors (43530298).

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

42028868 is a wasteful number, since it uses less digits than its factorization.

42028868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214451 (or 214442 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 42028868 is about 6482.9675303830. The cubic root of 42028868 is about 347.6822858820.

The spelling of 42028868 in words is "forty-two million, twenty-eight thousand, eight hundred sixty-eight".