73928644 has 12 divisors (see below), whose sum is σ = 129453100. Its totient is φ = 36942048.

The previous prime is 73928641. The next prime is 73928683. The reversal of 73928644 is 44682937.

It can be written as a sum of positive squares in 2 ways, for example, as 46240000 + 27688644 = 6800^2 + 5262^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 73928644.

It is not an unprimeable number, because it can be changed into a prime (73928641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3562 + ... + 12670.

Almost surely, 2^73928644 is an apocalyptic number.

It is an amenable number.

73928644 is a deficient number, since it is larger than the sum of its proper divisors (55524456).

73928644 is a wasteful number, since it uses less digits than its factorization.

73928644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11142 (or 11140 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 73928644 is about 8598.1767834815. The cubic root of 73928644 is about 419.6986576157.

The spelling of 73928644 in words is "seventy-three million, nine hundred twenty-eight thousand, six hundred forty-four".