9213890 has 16 divisors (see below), whose sum is σ = 18954432. Its totient is φ = 3159024.

The previous prime is 9213871. The next prime is 9213923. The reversal of 9213890 is 983129.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65744 + ... + 65883.

It is an arithmetic number, because the mean of its divisors is an integer number (1184652).

Almost surely, 2^9213890 is an apocalyptic number.

9213890 is an abundant number, since it is smaller than the sum of its proper divisors (9740542).

9213890 is a wasteful number, since it uses less digits than its factorization.

9213890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131641.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 9213890 is about 3035.4390127295. The cubic root of 9213890 is about 209.6433098399.

The spelling of 9213890 in words is "nine million, two hundred thirteen thousand, eight hundred ninety".