8187220408 has 32 divisors (see below), whose sum is σ = 15665091120. Its totient is φ = 4010400000.

The previous prime is 8187220387. The next prime is 8187220411. The reversal of 8187220408 is 8040227818.

It is a congruent number.

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, 89068 + ... + 155908.

Almost surely, 2^8187220408 is an apocalyptic number.

It is an amenable number.

8187220408 is a deficient number, since it is larger than the sum of its proper divisors (7477870712).

8187220408 is a wasteful number, since it uses less digits than its factorization.

8187220408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67159 (or 67155 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 8187220408 is about 90483.2603745024. The cubic root of 8187220408 is about 2015.4815522209.

The spelling of 8187220408 in words is "eight billion, one hundred eighty-seven million, two hundred twenty thousand, four hundred eight".