42724389 has 8 divisors (see below), whose sum is σ = 57030400. Its totient is φ = 28450656.

The previous prime is 42724387. The next prime is 42724391. The reversal of 42724389 is 98342724.

42724389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42724387) and next prime (42724391).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42724389 - 2¹ = 42724387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42724387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4789 + ... + 10410.

It is an arithmetic number, because the mean of its divisors is an integer number (7128800).

Almost surely, 2^42724389 is an apocalyptic number.

It is an amenable number.

42724389 is a deficient number, since it is larger than the sum of its proper divisors (14306011).

42724389 is a wasteful number, since it uses less digits than its factorization.

42724389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16139.

The product of its digits is 96768, while the sum is 39.

The square root of 42724389 is about 6536.3895997714. The cubic root of 42724389 is about 349.5896933332.

The spelling of 42724389 in words is "forty-two million, seven hundred twenty-four thousand, three hundred eighty-nine".