42028019 has 24 divisors (see below), whose sum is σ = 49380240. Its totient is φ = 35640000.

The previous prime is 42028013. The next prime is 42028031. The reversal of 42028019 is 91082024.

42028019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42028019 - 2¹² = 42023923 is a prime.

It is a super-2 number, since 2×42028019² = 3532708762128722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42028013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232109 + ... + 232289.

It is an arithmetic number, because the mean of its divisors is an integer number (2057510).

Almost surely, 2^42028019 is an apocalyptic number.

42028019 is a deficient number, since it is larger than the sum of its proper divisors (7352221).

42028019 is a wasteful number, since it uses less digits than its factorization.

42028019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 42028019 is about 6482.9020507794. The cubic root of 42028019 is about 347.6799447590.

It can be divided in two parts, 4202 and 8019, that added together give a palindrome (12221).

The spelling of 42028019 in words is "forty-two million, twenty-eight thousand, nineteen".