8122890 has 16 divisors (see below), whose sum is σ = 19495008. Its totient is φ = 2166096.

The previous prime is 8122847. The next prime is 8122903. The reversal of 8122890 is 982218.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 270763 = 8122890 / (8 + 1 + 2 + 2 + 8 + 9 + 0).

It is an Ulam number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 135352 + ... + 135411.

It is an arithmetic number, because the mean of its divisors is an integer number (1218438).

Almost surely, 2^8122890 is an apocalyptic number.

8122890 is an abundant number, since it is smaller than the sum of its proper divisors (11372118).

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

8122890 is a wasteful number, since it uses less digits than its factorization.

8122890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270773.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 8122890 is about 2850.0684202313. The cubic root of 8122890 is about 201.0188838970.

It can be divided in two parts, 81228 and 90, that added together give a palindrome (81318).

The spelling of 8122890 in words is "eight million, one hundred twenty-two thousand, eight hundred ninety".