73445428 has 12 divisors (see below), whose sum is σ = 146890912. Its totient is φ = 31476600.

The previous prime is 73445401. The next prime is 73445447. The reversal of 73445428 is 82454437.

73445428 is an admirable number.

It is a congruent number.

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, 1311498 + ... + 1311553.

Almost surely, 2^73445428 is an apocalyptic number.

It is an amenable number.

73445428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

73445428 is a wasteful number, since it uses less digits than its factorization.

73445428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623062 (or 2623060 counting only the distinct ones).

The product of its digits is 107520, while the sum is 37.

The square root of 73445428 is about 8570.0308050788. The cubic root of 73445428 is about 418.7822397989.

Subtracting 73445428 from its reverse (82454437), we obtain a palindrome (9009009).

The spelling of 73445428 in words is "seventy-three million, four hundred forty-five thousand, four hundred twenty-eight".