42738029 has 4 divisors (see below), whose sum is σ = 42757020. Its totient is φ = 42719040.

The previous prime is 42738019. The next prime is 42738077. The reversal of 42738029 is 92083724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6135529 + 36602500 = 2477^2 + 6050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42738029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42738029.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42738019) 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 3 ways as a sum of consecutive naturals, for example, 5582 + ... + 10799.

It is an arithmetic number, because the mean of its divisors is an integer number (10689255).

Almost surely, 2^42738029 is an apocalyptic number.

It is an amenable number.

42738029 is a deficient number, since it is larger than the sum of its proper divisors (18991).

42738029 is a wasteful number, since it uses less digits than its factorization.

42738029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18990.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 42738029 is about 6537.4329059655. The cubic root of 42738029 is about 349.6268921960.

The spelling of 42738029 in words is "forty-two million, seven hundred thirty-eight thousand, twenty-nine".