8921290 has 16 divisors (see below), whose sum is σ = 18352512. Its totient is φ = 3058704.

The previous prime is 8921287. The next prime is 8921321. The reversal of 8921290 is 921298.

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

It is an unprimeable number.

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, 63654 + ... + 63793.

It is an arithmetic number, because the mean of its divisors is an integer number (1147032).

Almost surely, 2^8921290 is an apocalyptic number.

8921290 is an abundant number, since it is smaller than the sum of its proper divisors (9431222).

8921290 is a wasteful number, since it uses less digits than its factorization.

8921290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127461.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 8921290 is about 2986.8528587796. The cubic root of 8921290 is about 207.4002229930.

The spelling of 8921290 in words is "eight million, nine hundred twenty-one thousand, two hundred ninety".