73613128 has 32 divisors (see below), whose sum is σ = 150103800. Its totient is φ = 33702912.

The previous prime is 73613063. The next prime is 73613129. The reversal of 73613128 is 82131637.

It can be written as a sum of positive squares in 4 ways, for example, as 70930084 + 2683044 = 8422^2 + 1638^2 .

It is a super-2 number, since 2×73613128² = 10837785227888768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73613128.

It is not an unprimeable number, because it can be changed into a prime (73613129) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2283 + ... + 12346.

Almost surely, 2^73613128 is an apocalyptic number.

It is an amenable number.

73613128 is an abundant number, since it is smaller than the sum of its proper divisors (76490672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73613128 is a wasteful number, since it uses less digits than its factorization.

73613128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14689 (or 14685 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 73613128 is about 8579.8093218906. The cubic root of 73613128 is about 419.1007365780.

The spelling of 73613128 in words is "seventy-three million, six hundred thirteen thousand, one hundred twenty-eight".