43809838864 has 135 divisors (see below), whose sum is σ = 96065656743. Its totient is φ = 19340059200.

The previous prime is 43809838859. The next prime is 43809838889. The reversal of 43809838864 is 46883890834.

The square root of 43809838864 is 209308.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 617039949 + ... + 617040019.

Almost surely, 2^43809838864 is an apocalyptic number.

43809838864 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

43809838864 is the 209308-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43809838864

43809838864 is an abundant number, since it is smaller than the sum of its proper divisors (52255817879).

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

43809838864 is an equidigital number, since it uses as much as digits as its factorization.

43809838864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 61.

The spelling of 43809838864 in words is "forty-three billion, eight hundred nine million, eight hundred thirty-eight thousand, eight hundred sixty-four".