73491444 has 72 divisors (see below), whose sum is σ = 201072872. Its totient is φ = 22498560.

The previous prime is 73491413. The next prime is 73491469. The reversal of 73491444 is 44419437.

It can be written as a sum of positive squares in 4 ways, for example, as 1411344 + 72080100 = 1188^2 + 8490^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 73491399 and 73491408.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 174354 + ... + 174774.

Almost surely, 2^73491444 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 73491444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100536436).

73491444 is an abundant number, since it is smaller than the sum of its proper divisors (127581428).

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

73491444 is a wasteful number, since it uses less digits than its factorization.

73491444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817 (or 812 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 73491444 is about 8572.7150891652. The cubic root of 73491444 is about 418.8696818671.

The spelling of 73491444 in words is "seventy-three million, four hundred ninety-one thousand, four hundred forty-four".