8866394397 has 48 divisors (see below), whose sum is σ = 15178525440. Its totient is φ = 4881586176.

The previous prime is 8866394377. The next prime is 8866394399. The reversal of 8866394397 is 7934936688.

It is not a de Polignac number, because 8866394397 - 2¹⁵ = 8866361629 is a prime.

It is a super-2 number, since 2×8866394397² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8866394399) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221629 + ... + 258557.

It is an arithmetic number, because the mean of its divisors is an integer number (316219280).

Almost surely, 2^8866394397 is an apocalyptic number.

It is an amenable number.

8866394397 is a deficient number, since it is larger than the sum of its proper divisors (6312131043).

8866394397 is a wasteful number, since it uses less digits than its factorization.

8866394397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37082 (or 37079 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 63.

The square root of 8866394397 is about 94161.5335314798. The cubic root of 8866394397 is about 2069.7394708170.

The spelling of 8866394397 in words is "eight billion, eight hundred sixty-six million, three hundred ninety-four thousand, three hundred ninety-seven".