8213766 has 32 divisors (see below), whose sum is σ = 18119808. Its totient is φ = 2461440.

The previous prime is 8213761. The next prime is 8213789. The reversal of 8213766 is 6673128.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8213761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5761 + ... + 7043.

It is an arithmetic number, because the mean of its divisors is an integer number (566244).

Almost surely, 2^8213766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8213766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9059904).

8213766 is an abundant number, since it is smaller than the sum of its proper divisors (9906042).

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

8213766 is a wasteful number, since it uses less digits than its factorization.

8213766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396.

The product of its digits is 12096, while the sum is 33.

The square root of 8213766 is about 2865.9668525648. The cubic root of 8213766 is about 201.7657481231.

The spelling of 8213766 in words is "eight million, two hundred thirteen thousand, seven hundred sixty-six".