43765981028 has 48 divisors (see below), whose sum is σ = 96834382848. Its totient is φ = 16811508000.

The previous prime is 43765981019. The next prime is 43765981037. The reversal of 43765981028 is 82018956734.

It is an interprime number because it is at equal distance from previous prime (43765981019) and next prime (43765981037).

It is a super-2 number, since 2×43765981028² (a number of 22 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 978818 + ... + 1022553.

It is an arithmetic number, because the mean of its divisors is an integer number (2017382976).

It is a 1-persistent number, because it is pandigital, but 2⋅43765981028 = 87531962056 is not.

Almost surely, 2^43765981028 is an apocalyptic number.

It is an amenable number.

43765981028 is an abundant number, since it is smaller than the sum of its proper divisors (53068401820).

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

43765981028 is a wasteful number, since it uses less digits than its factorization.

43765981028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001464 (or 2001462 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 43765981028 in words is "forty-three billion, seven hundred sixty-five million, nine hundred eighty-one thousand, twenty-eight".