28216084 has 24 divisors (see below), whose sum is σ = 54417440. Its totient is φ = 12718944.

The previous prime is 28216079. The next prime is 28216091. The reversal of 28216084 is 48061282.

It is a super-2 number, since 2×28216084² = 1592294792590112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4074 + ... + 8545.

Almost surely, 2^28216084 is an apocalyptic number.

It is an amenable number.

28216084 is a deficient number, since it is larger than the sum of its proper divisors (26201356).

28216084 is a wasteful number, since it uses less digits than its factorization.

28216084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12679 (or 12677 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 28216084 is about 5311.8813992784. The cubic root of 28216084 is about 304.4380371528.

The spelling of 28216084 in words is "twenty-eight million, two hundred sixteen thousand, eighty-four".