42718728 has 64 divisors (see below), whose sum is σ = 120032640. Its totient is φ = 12570624.

The previous prime is 42718721. The next prime is 42718729. The reversal of 42718728 is 82781724.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (42718721) 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 15 ways as a sum of consecutive naturals, for example, 4200 + ... + 10152.

It is an arithmetic number, because the mean of its divisors is an integer number (1875510).

Almost surely, 2^42718728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42718728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60016320).

42718728 is an abundant number, since it is smaller than the sum of its proper divisors (77313912).

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

42718728 is a wasteful number, since it uses less digits than its factorization.

42718728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5998 (or 5994 counting only the distinct ones).

The product of its digits is 50176, while the sum is 39.

The square root of 42718728 is about 6535.9565482032. The cubic root of 42718728 is about 349.5742523894.

The spelling of 42718728 in words is "forty-two million, seven hundred eighteen thousand, seven hundred twenty-eight".