43840403712 has 504 divisors, whose sum is σ = 154170220736. Its totient is φ = 12173856768.

The previous prime is 43840403689. The next prime is 43840403731. The reversal of 43840403712 is 21730404834.

It is a tau number, because it is divible by the number of its divisors (504).

It is a super-2 number, since 2×43840403712² (a number of 22 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 48335163 + ... + 48336069.

Almost surely, 2^43840403712 is an apocalyptic number.

43840403712 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43840403712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77085110368).

43840403712 is an abundant number, since it is smaller than the sum of its proper divisors (110329817024).

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

43840403712 is an frugal number, since it uses more digits than its factorization.

43840403712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985 (or 956 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 43840403712 in words is "forty-three billion, eight hundred forty million, four hundred three thousand, seven hundred twelve".