28777086 has 32 divisors (see below), whose sum is σ = 68869920. Its totient is φ = 8854272.

The previous prime is 28777079. The next prime is 28777097. The reversal of 28777086 is 68077782.

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, 19795 + ... + 21198.

It is an arithmetic number, because the mean of its divisors is an integer number (2152185).

Almost surely, 2^28777086 is an apocalyptic number.

28777086 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28777086 is an abundant number, since it is smaller than the sum of its proper divisors (40092834).

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

28777086 is a wasteful number, since it uses less digits than its factorization.

28777086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41017 (or 41011 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The square root of 28777086 is about 5364.4278352868. The cubic root of 28777086 is about 306.4424587294.

The spelling of 28777086 in words is "twenty-eight million, seven hundred seventy-seven thousand, eighty-six".