6408109440 has 96 divisors (see below), whose sum is σ = 22128022800. Its totient is φ = 1708827648.

The previous prime is 6408109427. The next prime is 6408109451. The reversal of 6408109440 is 449018046.

It is a happy number.

6408109440 is a `hidden beast` number, since 640 + 8 + 1 + 0 + 9 + 4 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×6408109440² = 82127733190034227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6408109395 and 6408109404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 550500 + ... + 562019.

Almost surely, 2^6408109440 is an apocalyptic number.

6408109440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6408109440 is an abundant number, since it is smaller than the sum of its proper divisors (15719913360).

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

6408109440 is a wasteful number, since it uses less digits than its factorization.

6408109440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112544 (or 1112529 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 6408109440 is about 80050.6679547398. The cubic root of 6408109440 is about 1857.4193834276.

The spelling of 6408109440 in words is "six billion, four hundred eight million, one hundred nine thousand, four hundred forty".