8921856 has 36 divisors (see below), whose sum is σ = 23747192. Its totient is φ = 2973696.

The previous prime is 8921837. The next prime is 8921863. The reversal of 8921856 is 6581298.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5041 + ... + 6576.

Almost surely, 2^8921856 is an apocalyptic number.

It is an amenable number.

8921856 is an abundant number, since it is smaller than the sum of its proper divisors (14825336).

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

8921856 is a wasteful number, since it uses less digits than its factorization.

8921856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11636 (or 11622 counting only the distinct ones).

The product of its digits is 34560, while the sum is 39.

The square root of 8921856 is about 2986.9476058344. The cubic root of 8921856 is about 207.4046089821.

It can be divided in two parts, 89 and 21856, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 8921856 in words is "eight million, nine hundred twenty-one thousand, eight hundred fifty-six".