74539138 has 8 divisors (see below), whose sum is σ = 111864060. Its totient is φ = 37251120.

The previous prime is 74539121. The next prime is 74539139. The reversal of 74539138 is 83193547.

It can be written as a sum of positive squares in 2 ways, for example, as 73153809 + 1385329 = 8553^2 + 1177^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 74539138.

It is not an unprimeable number, because it can be changed into a prime (74539139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3453 + ... + 12688.

Almost surely, 2^74539138 is an apocalyptic number.

74539138 is a deficient number, since it is larger than the sum of its proper divisors (37324922).

74539138 is a wasteful number, since it uses less digits than its factorization.

74539138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18452.

The product of its digits is 90720, while the sum is 40.

The square root of 74539138 is about 8633.6051565959. The cubic root of 74539138 is about 420.8507660480.

The spelling of 74539138 in words is "seventy-four million, five hundred thirty-nine thousand, one hundred thirty-eight".