84187928 has 48 divisors (see below), whose sum is σ = 179550000. Its totient is φ = 36935360.

The previous prime is 84187897. The next prime is 84187931. The reversal of 84187928 is 82978148.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26573 + ... + 29571.

It is an arithmetic number, because the mean of its divisors is an integer number (3740625).

Almost surely, 2^84187928 is an apocalyptic number.

84187928 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84187928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89775000).

84187928 is an abundant number, since it is smaller than the sum of its proper divisors (95362072).

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

84187928 is a wasteful number, since it uses less digits than its factorization.

84187928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056 (or 3041 counting only the distinct ones).

The product of its digits is 258048, while the sum is 47.

The square root of 84187928 is about 9175.3979750199. The cubic root of 84187928 is about 438.2782716317.

The spelling of 84187928 in words is "eighty-four million, one hundred eighty-seven thousand, nine hundred twenty-eight".