43487921840 has 80 divisors (see below), whose sum is σ = 111313366560. Its totient is φ = 15668674560.

The previous prime is 43487921837. The next prime is 43487921909. The reversal of 43487921840 is 4812978434.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130769 + ... + 322608.

It is an arithmetic number, because the mean of its divisors is an integer number (1391417082).

Almost surely, 2^43487921840 is an apocalyptic number.

43487921840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43487921840 is an abundant number, since it is smaller than the sum of its proper divisors (67825444720).

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

43487921840 is a wasteful number, since it uses less digits than its factorization.

43487921840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453510 (or 453504 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 50.

The spelling of 43487921840 in words is "forty-three billion, four hundred eighty-seven million, nine hundred twenty-one thousand, eight hundred forty".