8921070 has 128 divisors (see below), whose sum is σ = 26265600. Its totient is φ = 2146176.

The previous prime is 8921069. The next prime is 8921071. The reversal of 8921070 is 701298.

It is an interprime number because it is at equal distance from previous prime (8921069) and next prime (8921071).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8921071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 189787 + ... + 189833.

It is an arithmetic number, because the mean of its divisors is an integer number (205200).

Almost surely, 2^8921070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8921070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13132800).

8921070 is an abundant number, since it is smaller than the sum of its proper divisors (17344530).

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

8921070 is a wasteful number, since it uses less digits than its factorization.

8921070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 8921070 is about 2986.8160304913. The cubic root of 8921070 is about 207.3985181415.

The spelling of 8921070 in words is "eight million, nine hundred twenty-one thousand, seventy".