42736306 has 4 divisors (see below), whose sum is σ = 64104462. Its totient is φ = 21368152.

The previous prime is 42736297. The next prime is 42736313. The reversal of 42736306 is 60363724.

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

It can be written as a sum of positive squares in only one way, i.e., 40513225 + 2223081 = 6365^2 + 1491^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10684075 + ... + 10684078.

Almost surely, 2^42736306 is an apocalyptic number.

42736306 is a deficient number, since it is larger than the sum of its proper divisors (21368156).

42736306 is a wasteful number, since it uses less digits than its factorization.

42736306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21368155.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 42736306 is about 6537.3011250821. The cubic root of 42736306 is about 349.6221936855.

The spelling of 42736306 in words is "forty-two million, seven hundred thirty-six thousand, three hundred six".