73728818 has 4 divisors (see below), whose sum is σ = 110593230. Its totient is φ = 36864408.

The previous prime is 73728793. The next prime is 73728839. The reversal of 73728818 is 81882737.

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., 63888049 + 9840769 = 7993^2 + 3137^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18432203 + ... + 18432206.

Almost surely, 2^73728818 is an apocalyptic number.

73728818 is a deficient number, since it is larger than the sum of its proper divisors (36864412).

73728818 is a wasteful number, since it uses less digits than its factorization.

73728818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36864411.

The product of its digits is 150528, while the sum is 44.

The square root of 73728818 is about 8586.5486663735. The cubic root of 73728818 is about 419.3201738247.

The spelling of 73728818 in words is "seventy-three million, seven hundred twenty-eight thousand, eight hundred eighteen".