8921388 has 24 divisors (see below), whose sum is σ = 23790592. Its totient is φ = 2548944.

The previous prime is 8921387. The next prime is 8921389. The reversal of 8921388 is 8831298.

It is an interprime number because it is at equal distance from previous prime (8921387) and next prime (8921389).

It is not an unprimeable number, because it can be changed into a prime (8921383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53020 + ... + 53187.

Almost surely, 2^8921388 is an apocalyptic number.

It is an amenable number.

8921388 is an abundant number, since it is smaller than the sum of its proper divisors (14869204).

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

8921388 is a wasteful number, since it uses less digits than its factorization.

8921388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106221 (or 106219 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 8921388 is about 2986.8692639618. The cubic root of 8921388 is about 207.4009824178.

The spelling of 8921388 in words is "eight million, nine hundred twenty-one thousand, three hundred eighty-eight".