28951776 has 96 divisors (see below), whose sum is σ = 96526080. Its totient is φ = 8270208.

The previous prime is 28951757. The next prime is 28951823. The reversal of 28951776 is 67715982.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3655 + ... + 8441.

It is an arithmetic number, because the mean of its divisors is an integer number (1005480).

Almost surely, 2^28951776 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 28951776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48263040).

28951776 is an abundant number, since it is smaller than the sum of its proper divisors (67574304).

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

28951776 is a wasteful number, since it uses less digits than its factorization.

28951776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4813 (or 4799 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 28951776 is about 5380.6854581921. The cubic root of 28951776 is about 307.0612899167.

The spelling of 28951776 in words is "twenty-eight million, nine hundred fifty-one thousand, seven hundred seventy-six".