8921672 has 16 divisors (see below), whose sum is σ = 16902060. Its totient is φ = 4414464.

The previous prime is 8921669. The next prime is 8921701. The reversal of 8921672 is 2761298.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8916196 + 5476 = 2986^2 + 74^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4973 + ... + 6524.

Almost surely, 2^8921672 is an apocalyptic number.

It is an amenable number.

8921672 is a deficient number, since it is larger than the sum of its proper divisors (7980388).

8921672 is a wasteful number, since it uses less digits than its factorization.

8921672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11600 (or 11596 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 8921672 is about 2986.9168050014. The cubic root of 8921672 is about 207.4031831686.

The spelling of 8921672 in words is "eight million, nine hundred twenty-one thousand, six hundred seventy-two".