28167776 has 96 divisors (see below), whose sum is σ = 72394560. Its totient is φ = 10469376.

The previous prime is 28167773. The next prime is 28167791. The reversal of 28167776 is 67776182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28167773) 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 15 ways as a sum of consecutive naturals, for example, 49220 + ... + 49788.

It is an arithmetic number, because the mean of its divisors is an integer number (754110).

Almost surely, 2^28167776 is an apocalyptic number.

28167776 is a gapful number since it is divisible by the number (26) 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 28167776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36197280).

28167776 is an abundant number, since it is smaller than the sum of its proper divisors (44226784).

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

28167776 is a wasteful number, since it uses less digits than its factorization.

28167776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 608 counting only the distinct ones).

The product of its digits is 197568, while the sum is 44.

The square root of 28167776 is about 5307.3322865636. The cubic root of 28167776 is about 304.2641978427.

The spelling of 28167776 in words is "twenty-eight million, one hundred sixty-seven thousand, seven hundred seventy-six".