Adding to 73513440 its reverse (4431537), we get a palindrome (77944977).
It is a congruent number.
It is an unprimeable number.
73513440 is a highly composite number, because it has more divisors than any smaller number.
73513440 is a superabundant number, because it has a larger abundancy index than any smaller number.
Almost surely, 273513440 is an apocalyptic number.
73513440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 73513440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182891520).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
73513440 is a wasteful number, since it uses less digits than its factorization.
73513440 is an evil number, because the sum of its binary digits is even.
The square root of 73513440 is about 8573.9979006296. The cubic root of 73513440 is about 418.9114669511.
The spelling of 73513440 in words is "seventy-three million, five hundred thirteen thousand, four hundred forty".