42728611 has 4 divisors (see below), whose sum is σ = 42741712. Its totient is φ = 42715512.

The previous prime is 42728603. The next prime is 42728617. The reversal of 42728611 is 11682724.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42728611 - 2³ = 42728603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42728617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2650 + ... + 9616.

It is an arithmetic number, because the mean of its divisors is an integer number (10685428).

Almost surely, 2^42728611 is an apocalyptic number.

42728611 is a deficient number, since it is larger than the sum of its proper divisors (13101).

42728611 is an equidigital number, since it uses as much as digits as its factorization.

42728611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13100.

The product of its digits is 5376, while the sum is 31.

The square root of 42728611 is about 6536.7125529581. The cubic root of 42728611 is about 349.6012083726.

The spelling of 42728611 in words is "forty-two million, seven hundred twenty-eight thousand, six hundred eleven".