42428028 has 24 divisors (see below), whose sum is σ = 101106432. Its totient is φ = 13841584.

The previous prime is 42428027. The next prime is 42428041. The reversal of 42428028 is 82082424.

It is a junction number, because it is equal to n+sod(n) for n = 42427986 and 42428004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42428027) 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, 37050 + ... + 38177.

It is an arithmetic number, because the mean of its divisors is an integer number (4212768).

Almost surely, 2^42428028 is an apocalyptic number.

It is an amenable number.

42428028 is an abundant number, since it is smaller than the sum of its proper divisors (58678404).

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

42428028 is a wasteful number, since it uses less digits than its factorization.

42428028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75281 (or 75279 counting only the distinct ones).

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

The square root of 42428028 is about 6513.6800658307. The cubic root of 42428028 is about 348.7794985390.

The spelling of 42428028 in words is "forty-two million, four hundred twenty-eight thousand, twenty-eight".