8211390 has 64 divisors (see below), whose sum is σ = 21772800. Its totient is φ = 1965440.

The previous prime is 8211389. The next prime is 8211397. The reversal of 8211390 is 931128.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8211390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8211397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49087 + ... + 49253.

It is an arithmetic number, because the mean of its divisors is an integer number (340200).

Almost surely, 2^8211390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8211390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10886400).

8211390 is an abundant number, since it is smaller than the sum of its proper divisors (13561410).

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

8211390 is a wasteful number, since it uses less digits than its factorization.

8211390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 8211390 is about 2865.5523027856. The cubic root of 8211390 is about 201.7462912889.

It can be divided in two parts, 821 and 1390, that added together give a triangular number (2211 = T₆₆).

The spelling of 8211390 in words is "eight million, two hundred eleven thousand, three hundred ninety".