74131538 has 16 divisors (see below), whose sum is σ = 120450456. Its totient is φ = 34014720.

The previous prime is 74131537. The next prime is 74131583. The reversal of 74131538 is 83513147.

It can be written as a sum of positive squares in 4 ways, for example, as 62995969 + 11135569 = 7937^2 + 3337^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74131537) 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 7 ways as a sum of consecutive naturals, for example, 3743 + ... + 12738.

Almost surely, 2^74131538 is an apocalyptic number.

74131538 is a deficient number, since it is larger than the sum of its proper divisors (46318918).

74131538 is a wasteful number, since it uses less digits than its factorization.

74131538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16669.

The product of its digits is 10080, while the sum is 32.

The square root of 74131538 is about 8609.9673634689. The cubic root of 74131538 is about 420.0822552426.

The spelling of 74131538 in words is "seventy-four million, one hundred thirty-one thousand, five hundred thirty-eight".