28808216 has 8 divisors (see below), whose sum is σ = 54015420. Its totient is φ = 14404104.

The previous prime is 28808189. The next prime is 28808243. The reversal of 28808216 is 61280882.

It is an interprime number because it is at equal distance from previous prime (28808189) and next prime (28808243).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1800506 + ... + 1800521.

Almost surely, 2^28808216 is an apocalyptic number.

It is an amenable number.

28808216 is a deficient number, since it is larger than the sum of its proper divisors (25207204).

28808216 is a wasteful number, since it uses less digits than its factorization.

28808216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601033 (or 3601029 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 28808216 is about 5367.3285720179. The cubic root of 28808216 is about 306.5529183264.

The spelling of 28808216 in words is "twenty-eight million, eight hundred eight thousand, two hundred sixteen".