73004240 has 40 divisors (see below), whose sum is σ = 172622880. Its totient is φ = 28704896.

The previous prime is 73004221. The next prime is 73004249. The reversal of 73004240 is 4240037.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73004249) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3014 + ... + 12453.

It is an arithmetic number, because the mean of its divisors is an integer number (4315572).

Almost surely, 2^73004240 is an apocalyptic number.

It is an amenable number.

73004240 is an abundant number, since it is smaller than the sum of its proper divisors (99618640).

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

73004240 is a wasteful number, since it uses less digits than its factorization.

73004240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15539 (or 15533 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 73004240 is about 8544.2518689467. The cubic root of 73004240 is about 417.9420109875.

Adding to 73004240 its reverse (4240037), we get a palindrome (77244277).

The spelling of 73004240 in words is "seventy-three million, four thousand, two hundred forty".