71728308 has 24 divisors (see below), whose sum is σ = 185962560. Its totient is φ = 23909400.

The previous prime is 71728301. The next prime is 71728333. The reversal of 71728308 is 80382717.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71728301) 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, 331968 + ... + 332183.

It is an arithmetic number, because the mean of its divisors is an integer number (7748440).

Almost surely, 2^71728308 is an apocalyptic number.

It is an amenable number.

71728308 is an abundant number, since it is smaller than the sum of its proper divisors (114234252).

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

71728308 is a wasteful number, since it uses less digits than its factorization.

71728308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664164 (or 664156 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 71728308 is about 8469.2566379819. The cubic root of 71728308 is about 415.4928252746.

The spelling of 71728308 in words is "seventy-one million, seven hundred twenty-eight thousand, three hundred eight".