83329728 has 28 divisors (see below), whose sum is σ = 220477080. Its totient is φ = 27776512.

The previous prime is 83329723. The next prime is 83329739. The reversal of 83329728 is 82792338.

It is a self number, because there is not a number n which added to its sum of digits gives 83329728.

It is not an unprimeable number, because it can be changed into a prime (83329723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216813 + ... + 217196.

Almost surely, 2^83329728 is an apocalyptic number.

It is an amenable number.

83329728 is an abundant number, since it is smaller than the sum of its proper divisors (137147352).

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

83329728 is a wasteful number, since it uses less digits than its factorization.

83329728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434024 (or 434014 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 83329728 is about 9128.5118173775. The cubic root of 83329728 is about 436.7839331798.

The spelling of 83329728 in words is "eighty-three million, three hundred twenty-nine thousand, seven hundred twenty-eight".