8218380 has 24 divisors (see below), whose sum is σ = 23011632. Its totient is φ = 2191552.

The previous prime is 8218369. The next prime is 8218381. The reversal of 8218380 is 838128.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (8218381) by changing a digit.

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, 68427 + ... + 68546.

It is an arithmetic number, because the mean of its divisors is an integer number (958818).

Almost surely, 2^8218380 is an apocalyptic number.

It is an amenable number.

8218380 is an abundant number, since it is smaller than the sum of its proper divisors (14793252).

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

8218380 is a wasteful number, since it uses less digits than its factorization.

8218380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136985 (or 136983 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 8218380 is about 2866.7717035020. The cubic root of 8218380 is about 201.8035210075.

The spelling of 8218380 in words is "eight million, two hundred eighteen thousand, three hundred eighty".