42128744 has 16 divisors (see below), whose sum is σ = 90276000. Its totient is φ = 18055152.

The previous prime is 42128743. The next prime is 42128753. The reversal of 42128744 is 44782124.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 42128744.

It is not an unprimeable number, because it can be changed into a prime (42128741) 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 in 3 ways as a sum of consecutive naturals, for example, 376094 + ... + 376205.

It is an arithmetic number, because the mean of its divisors is an integer number (5642250).

Almost surely, 2^42128744 is an apocalyptic number.

It is an amenable number.

42128744 is an abundant number, since it is smaller than the sum of its proper divisors (48147256).

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

42128744 is a wasteful number, since it uses less digits than its factorization.

42128744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752312 (or 752308 counting only the distinct ones).

The product of its digits is 14336, while the sum is 32.

The square root of 42128744 is about 6490.6659134483. The cubic root of 42128744 is about 347.9574748759.

The spelling of 42128744 in words is "forty-two million, one hundred twenty-eight thousand, seven hundred forty-four".