8621840400 has 60 divisors (see below), whose sum is σ = 27618632592. Its totient is φ = 2299157120.

The previous prime is 8621840393. The next prime is 8621840401. The reversal of 8621840400 is 40481268.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×8621840400² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8621840401) 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, 3591234 + ... + 3593633.

Almost surely, 2^8621840400 is an apocalyptic number.

8621840400 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8621840400 is an abundant number, since it is smaller than the sum of its proper divisors (18996792192).

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

8621840400 is a wasteful number, since it uses less digits than its factorization.

8621840400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7184888 (or 7184877 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 8621840400 is about 92853.8658322851. The cubic root of 8621840400 is about 2050.5325128609.

The spelling of 8621840400 in words is "eight billion, six hundred twenty-one million, eight hundred forty thousand, four hundred".