42728823 has 8 divisors (see below), whose sum is σ = 63302000. Its totient is φ = 28485864.

The previous prime is 42728789. The next prime is 42728827. The reversal of 42728823 is 32882724.

It is not a de Polignac number, because 42728823 - 2¹³ = 42720631 is a prime.

It is a super-3 number, since 3×42728823³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42728827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791248 + ... + 791301.

It is an arithmetic number, because the mean of its divisors is an integer number (7912750).

Almost surely, 2^42728823 is an apocalyptic number.

42728823 is a deficient number, since it is larger than the sum of its proper divisors (20573177).

42728823 is a wasteful number, since it uses less digits than its factorization.

42728823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582558 (or 1582552 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 42728823 is about 6536.7287690404. The cubic root of 42728823 is about 349.6017865592.

The spelling of 42728823 in words is "forty-two million, seven hundred twenty-eight thousand, eight hundred twenty-three".