73989928 has 16 divisors (see below), whose sum is σ = 141958080. Its totient is φ = 36134448.

The previous prime is 73989917. The next prime is 73989931. The reversal of 73989928 is 82998937.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107200 + ... + 107887.

It is an arithmetic number, because the mean of its divisors is an integer number (8872380).

Almost surely, 2^73989928 is an apocalyptic number.

It is an amenable number.

73989928 is a deficient number, since it is larger than the sum of its proper divisors (67968152).

73989928 is a wasteful number, since it uses less digits than its factorization.

73989928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215136 (or 215132 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 55.

The square root of 73989928 is about 8601.7398240123. The cubic root of 73989928 is about 419.8145969289.

Subtracting 73989928 from its reverse (82998937), we obtain a palindrome (9009009).

The spelling of 73989928 in words is "seventy-three million, nine hundred eighty-nine thousand, nine hundred twenty-eight".