43720441436 has 24 divisors (see below), whose sum is σ = 89474394240. Its totient is φ = 18301579632.

The previous prime is 43720441423. The next prime is 43720441447. The reversal of 43720441436 is 63414402734.

It is a super-2 number, since 2×43720441436² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43720441436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18155126 + ... + 18157533.

It is an arithmetic number, because the mean of its divisors is an integer number (3728099760).

Almost surely, 2^43720441436 is an apocalyptic number.

It is an amenable number.

43720441436 is an abundant number, since it is smaller than the sum of its proper divisors (45753952804).

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

43720441436 is a wasteful number, since it uses less digits than its factorization.

43720441436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36312713 (or 36312711 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 38.

The spelling of 43720441436 in words is "forty-three billion, seven hundred twenty million, four hundred forty-one thousand, four hundred thirty-six".