73485778 has 4 divisors (see below), whose sum is σ = 110228670. Its totient is φ = 36742888.

The previous prime is 73485773. The next prime is 73485799. The reversal of 73485778 is 87758437.

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., 62615569 + 10870209 = 7913^2 + 3297^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (73485773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18371443 + ... + 18371446.

Almost surely, 2^73485778 is an apocalyptic number.

73485778 is a deficient number, since it is larger than the sum of its proper divisors (36742892).

73485778 is a wasteful number, since it uses less digits than its factorization.

73485778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36742891.

The product of its digits is 1317120, while the sum is 49.

The square root of 73485778 is about 8572.3846157297. The cubic root of 73485778 is about 418.8589170012.

The spelling of 73485778 in words is "seventy-three million, four hundred eighty-five thousand, seven hundred seventy-eight".