42878228 has 6 divisors (see below), whose sum is σ = 75036906. Its totient is φ = 21439112.

The previous prime is 42878201. The next prime is 42878261. The reversal of 42878228 is 82287824.

It can be written as a sum of positive squares in only one way, i.e., 41628304 + 1249924 = 6452^2 + 1118^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5359775 + ... + 5359782.

It is an arithmetic number, because the mean of its divisors is an integer number (12506151).

Almost surely, 2^42878228 is an apocalyptic number.

It is an amenable number.

42878228 is a deficient number, since it is larger than the sum of its proper divisors (32158678).

42878228 is a wasteful number, since it uses less digits than its factorization.

42878228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10719561 (or 10719559 counting only the distinct ones).

The product of its digits is 114688, while the sum is 41.

The square root of 42878228 is about 6548.1469134405. The cubic root of 42878228 is about 350.0087834530.

The spelling of 42878228 in words is "forty-two million, eight hundred seventy-eight thousand, two hundred twenty-eight".