43876331640 has 128 divisors (see below), whose sum is σ = 146416896000. Its totient is φ = 11687359104.

The previous prime is 43876331633. The next prime is 43876331651. The reversal of 43876331640 is 4613367834.

43876331640 is a `hidden beast` number, since 4 + 3 + 8 + 7 + 633 + 1 + 6 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 970417 + ... + 1014623.

It is an arithmetic number, because the mean of its divisors is an integer number (1143882000).

Almost surely, 2^43876331640 is an apocalyptic number.

43876331640 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 43876331640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73208448000).

43876331640 is an abundant number, since it is smaller than the sum of its proper divisors (102540564360).

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

43876331640 is a wasteful number, since it uses less digits than its factorization.

43876331640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45146 (or 45136 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 43876331640 in words is "forty-three billion, eight hundred seventy-six million, three hundred thirty-one thousand, six hundred forty".