8212406 has 8 divisors (see below), whose sum is σ = 12373560. Its totient is φ = 4087888.

The previous prime is 8212397. The next prime is 8212439. The reversal of 8212406 is 6042128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×8212406² = 134887224617672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8591 + ... + 9498.

It is an arithmetic number, because the mean of its divisors is an integer number (1546695).

Almost surely, 2^8212406 is an apocalyptic number.

8212406 is a deficient number, since it is larger than the sum of its proper divisors (4161154).

8212406 is a wasteful number, since it uses less digits than its factorization.

8212406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18318.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 8212406 is about 2865.7295755182. The cubic root of 8212406 is about 201.7546116739.

The spelling of 8212406 in words is "eight million, two hundred twelve thousand, four hundred six".