42213928 has 32 divisors (see below), whose sum is σ = 81648000. Its totient is φ = 20448640.

The previous prime is 42213923. The next prime is 42213931. The reversal of 42213928 is 82931224.

It is a self number, because there is not a number n which added to its sum of digits gives 42213928.

It is not an unprimeable number, because it can be changed into a prime (42213923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58353 + ... + 59071.

It is an arithmetic number, because the mean of its divisors is an integer number (2551500).

Almost surely, 2^42213928 is an apocalyptic number.

It is an amenable number.

42213928 is a deficient number, since it is larger than the sum of its proper divisors (39434072).

42213928 is a wasteful number, since it uses less digits than its factorization.

42213928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 941 counting only the distinct ones).

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

The square root of 42213928 is about 6497.2246382590. The cubic root of 42213928 is about 348.1918394418.

The spelling of 42213928 in words is "forty-two million, two hundred thirteen thousand, nine hundred twenty-eight".