8211689406 has 24 divisors (see below), whose sum is σ = 17849214864. Its totient is φ = 2728426560.

The previous prime is 8211689393. The next prime is 8211689407. The reversal of 8211689406 is 6049861128.

8211689406 is a `hidden beast` number, since 82 + 1 + 168 + 9 + 406 = 666.

It is a super-2 number, since 2×8211689406² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8211689407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 727851 + ... + 739046.

It is an arithmetic number, because the mean of its divisors is an integer number (743717286).

Almost surely, 2^8211689406 is an apocalyptic number.

8211689406 is an abundant number, since it is smaller than the sum of its proper divisors (9637525458).

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

8211689406 is a wasteful number, since it uses less digits than its factorization.

8211689406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467216 (or 1467213 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 8211689406 is about 90618.3723424781. The cubic root of 8211689406 is about 2017.4874330233.

The spelling of 8211689406 in words is "eight billion, two hundred eleven million, six hundred eighty-nine thousand, four hundred six".