73463440 has 40 divisors (see below), whose sum is σ = 171919800. Its totient is φ = 29193216.

The previous prime is 73463419. The next prime is 73463471. The reversal of 73463440 is 4436437.

It can be written as a sum of positive squares in 4 ways, for example, as 1281424 + 72182016 = 1132^2 + 8496^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9636 + ... + 15484.

It is an arithmetic number, because the mean of its divisors is an integer number (4297995).

Almost surely, 2^73463440 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 73463440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85959900).

73463440 is an abundant number, since it is smaller than the sum of its proper divisors (98456360).

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

73463440 is a wasteful number, since it uses less digits than its factorization.

73463440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6019 (or 6013 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 31.

The square root of 73463440 is about 8571.0816120254. The cubic root of 73463440 is about 418.8164715152.

Adding to 73463440 its reverse (4436437), we get a palindrome (77899877).

The spelling of 73463440 in words is "seventy-three million, four hundred sixty-three thousand, four hundred forty".