42011728 has 20 divisors (see below), whose sum is σ = 88797888. Its totient is φ = 19096160.

The previous prime is 42011707. The next prime is 42011773. The reversal of 42011728 is 82711024.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 119176 + ... + 119527.

Almost surely, 2^42011728 is an apocalyptic number.

It is an amenable number.

42011728 is an abundant number, since it is smaller than the sum of its proper divisors (46786160).

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

42011728 is a wasteful number, since it uses less digits than its factorization.

42011728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238722 (or 238716 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 42011728 is about 6481.6454700948. The cubic root of 42011728 is about 347.6350161129.

It can be divided in two parts, 4201 and 1728, that added together give a square (5929 = 77²).

The spelling of 42011728 in words is "forty-two million, eleven thousand, seven hundred twenty-eight".