73139208 has 64 divisors (see below), whose sum is σ = 194400000. Its totient is φ = 22865472.

The previous prime is 73139201. The next prime is 73139243. The reversal of 73139208 is 80293137.

It is not an unprimeable number, because it can be changed into a prime (73139201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48043 + ... + 49541.

It is an arithmetic number, because the mean of its divisors is an integer number (3037500).

Almost surely, 2^73139208 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 73139208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97200000).

73139208 is an abundant number, since it is smaller than the sum of its proper divisors (121260792).

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

73139208 is a wasteful number, since it uses less digits than its factorization.

73139208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634 (or 1630 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 73139208 is about 8552.1463972502. The cubic root of 73139208 is about 418.1994118851.

The spelling of 73139208 in words is "seventy-three million, one hundred thirty-nine thousand, two hundred eight".