73440742 has 4 divisors (see below), whose sum is σ = 110161116. Its totient is φ = 36720370.

The previous prime is 73440709. The next prime is 73440769. The reversal of 73440742 is 24704437.

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

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 a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18360184 + ... + 18360187.

It is an arithmetic number, because the mean of its divisors is an integer number (27540279).

Almost surely, 2^73440742 is an apocalyptic number.

73440742 is a deficient number, since it is larger than the sum of its proper divisors (36720374).

73440742 is a wasteful number, since it uses less digits than its factorization.

73440742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36720373.

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 73440742 is about 8569.7574061347. The cubic root of 73440742 is about 418.7733331618.

It can be divided in two parts, 734407 and 42, that added together give a square (734449 = 857²).

The spelling of 73440742 in words is "seventy-three million, four hundred forty thousand, seven hundred forty-two".