84808728 has 128 divisors (see below), whose sum is σ = 252172800. Its totient is φ = 26345088.

The previous prime is 84808709. The next prime is 84808739. The reversal of 84808728 is 82780848.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213426 + ... + 213822.

It is an arithmetic number, because the mean of its divisors is an integer number (1970100).

Almost surely, 2^84808728 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 84808728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126086400).

84808728 is an abundant number, since it is smaller than the sum of its proper divisors (167364072).

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

84808728 is a wasteful number, since it uses less digits than its factorization.

84808728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 45.

The square root of 84808728 is about 9209.1654345006. The cubic root of 84808728 is about 439.3529193687.

The spelling of 84808728 in words is "eighty-four million, eight hundred eight thousand, seven hundred twenty-eight".