73444728 has 144 divisors (see below), whose sum is σ = 226725480. Its totient is φ = 19764864.

The previous prime is 73444717. The next prime is 73444751. The reversal of 73444728 is 82744437.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 424450 + ... + 424622.

Almost surely, 2^73444728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73444728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113362740).

73444728 is an abundant number, since it is smaller than the sum of its proper divisors (153280752).

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

73444728 is a wasteful number, since it uses less digits than its factorization.

73444728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 204 counting only the distinct ones).

The product of its digits is 150528, while the sum is 39.

The square root of 73444728 is about 8569.9899649883. The cubic root of 73444728 is about 418.7809093394.

The spelling of 73444728 in words is "seventy-three million, four hundred forty-four thousand, seven hundred twenty-eight".