8641400 has 24 divisors (see below), whose sum is σ = 20091720. Its totient is φ = 3456480.

The previous prime is 8641361. The next prime is 8641421. The reversal of 8641400 is 41468.

It is a happy number.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21404 + ... + 21803.

It is an arithmetic number, because the mean of its divisors is an integer number (837155).

Almost surely, 2^8641400 is an apocalyptic number.

It is an amenable number.

8641400 is an abundant number, since it is smaller than the sum of its proper divisors (11450320).

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

8641400 is a wasteful number, since it uses less digits than its factorization.

8641400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43223 (or 43214 counting only the distinct ones).

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

The square root of 8641400 is about 2939.6258265296. The cubic root of 8641400 is about 205.2081961801.

Adding to 8641400 its reverse (41468), we get a palindrome (8682868).

The spelling of 8641400 in words is "eight million, six hundred forty-one thousand, four hundred".