73140442 has 4 divisors (see below), whose sum is σ = 109710666. Its totient is φ = 36570220.

The previous prime is 73140383. The next prime is 73140469. The reversal of 73140442 is 24404137.

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., 41229241 + 31911201 = 6421^2 + 5649^2 .

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, 18285109 + ... + 18285112.

Almost surely, 2^73140442 is an apocalyptic number.

73140442 is a deficient number, since it is larger than the sum of its proper divisors (36570224).

73140442 is a wasteful number, since it uses less digits than its factorization.

73140442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36570223.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 73140442 is about 8552.2185425771. The cubic root of 73140442 is about 418.2017638164.

Adding to 73140442 its reverse (24404137), we get a palindrome (97544579).

The spelling of 73140442 in words is "seventy-three million, one hundred forty thousand, four hundred forty-two".