42738729 has 8 divisors (see below), whose sum is σ = 62165472. Its totient is φ = 25902240.

The previous prime is 42738727. The next prime is 42738743. The reversal of 42738729 is 92783724.

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

It is not a de Polignac number, because 42738729 - 2¹ = 42738727 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42738727) 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, 647524 + ... + 647589.

It is an arithmetic number, because the mean of its divisors is an integer number (7770684).

Almost surely, 2^42738729 is an apocalyptic number.

It is an amenable number.

42738729 is a deficient number, since it is larger than the sum of its proper divisors (19426743).

42738729 is a wasteful number, since it uses less digits than its factorization.

42738729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295127.

The product of its digits is 169344, while the sum is 42.

The square root of 42738729 is about 6537.4864435806. The cubic root of 42738729 is about 349.6288010150.

The spelling of 42738729 in words is "forty-two million, seven hundred thirty-eight thousand, seven hundred twenty-nine".