43868528640 has 224 divisors, whose sum is σ = 155971402560. Its totient is φ = 11697979392.

The previous prime is 43868528623. The next prime is 43868528647. The reversal of 43868528640 is 4682586834.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (43868528647) by changing a digit.

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, 1086087 + ... + 1125753.

Almost surely, 2^43868528640 is an apocalyptic number.

43868528640 is a gapful number since it is divisible by the number (40) 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 43868528640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77985701280).

43868528640 is an abundant number, since it is smaller than the sum of its proper divisors (112102873920).

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

43868528640 is an equidigital number, since it uses as much as digits as its factorization.

43868528640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39707 (or 39677 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 54.

The spelling of 43868528640 in words is "forty-three billion, eight hundred sixty-eight million, five hundred twenty-eight thousand, six hundred forty".