73281536 has 26 divisors (see below), whose sum is σ = 146553372. Its totient is φ = 36638720.

The previous prime is 73281493. The next prime is 73281541. The reversal of 73281536 is 63518237.

It is a junction number, because it is equal to n+sod(n) for n = 73281496 and 73281505.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4850 + ... + 13041.

Almost surely, 2^73281536 is an apocalyptic number.

It is an amenable number.

73281536 is a deficient number, since it is larger than the sum of its proper divisors (73271836).

73281536 is an equidigital number, since it uses as much as digits as its factorization.

73281536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17915 (or 17893 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 73281536 is about 8560.4635388512. The cubic root of 73281536 is about 418.4705064177.

The spelling of 73281536 in words is "seventy-three million, two hundred eighty-one thousand, five hundred thirty-six".