42293128 has 8 divisors (see below), whose sum is σ = 79299630. Its totient is φ = 21146560.

The previous prime is 42293117. The next prime is 42293129. The reversal of 42293128 is 82139224.

It can be written as a sum of positive squares in only one way, i.e., 32695524 + 9597604 = 5718^2 + 3098^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 42293128.

It is not an unprimeable number, because it can be changed into a prime (42293129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2643313 + ... + 2643328.

Almost surely, 2^42293128 is an apocalyptic number.

It is an amenable number.

42293128 is a deficient number, since it is larger than the sum of its proper divisors (37006502).

42293128 is a wasteful number, since it uses less digits than its factorization.

42293128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5286647 (or 5286643 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 42293128 is about 6503.3166922733. The cubic root of 42293128 is about 348.4094577082.

The spelling of 42293128 in words is "forty-two million, two hundred ninety-three thousand, one hundred twenty-eight".