73128016 has 40 divisors (see below), whose sum is σ = 161567784. Its totient is φ = 31764480.

The previous prime is 73128001. The next prime is 73128019. The reversal of 73128016 is 61082137.

It can be written as a sum of positive squares in 4 ways, for example, as 810000 + 72318016 = 900^2 + 8504^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73128019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6805 + ... + 13876.

Almost surely, 2^73128016 is an apocalyptic number.

It is an amenable number.

73128016 is an abundant number, since it is smaller than the sum of its proper divisors (88439768).

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

73128016 is a wasteful number, since it uses less digits than its factorization.

73128016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20719 (or 20713 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 73128016 is about 8551.4920335577. The cubic root of 73128016 is about 418.1780793846.

The spelling of 73128016 in words is "seventy-three million, one hundred twenty-eight thousand, sixteen".