8213930 has 16 divisors (see below), whose sum is σ = 14829480. Its totient is φ = 3275712.

The previous prime is 8213897. The next prime is 8213951. The reversal of 8213930 is 393128.

It can be written as a sum of positive squares in 4 ways, for example, as 5851561 + 2362369 = 2419^2 + 1537^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8213930.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2936 + ... + 5004.

Almost surely, 2^8213930 is an apocalyptic number.

8213930 is a deficient number, since it is larger than the sum of its proper divisors (6615550).

8213930 is a wasteful number, since it uses less digits than its factorization.

8213930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 8213930 is about 2865.9954640578. The cubic root of 8213930 is about 201.7670909648.

Adding to 8213930 its sum of digits (26), we get a square (8213956 = 2866²).

The spelling of 8213930 in words is "eight million, two hundred thirteen thousand, nine hundred thirty".