43929799920 has 240 divisors, whose sum is σ = 154875801600. Its totient is φ = 11144240640.

The previous prime is 43929799843. The next prime is 43929799961. The reversal of 43929799920 is 2999792934.

It is a happy number.

43929799920 is a `hidden beast` number, since 439 + 2 + 97 + 9 + 99 + 20 = 666.

43929799920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×43929799920² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1300201 + ... + 1333559.

It is an arithmetic number, because the mean of its divisors is an integer number (645315840).

Almost surely, 2^43929799920 is an apocalyptic number.

43929799920 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 43929799920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77437900800).

43929799920 is an abundant number, since it is smaller than the sum of its proper divisors (110946001680).

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

43929799920 is a wasteful number, since it uses less digits than its factorization.

43929799920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33468 (or 33459 counting only the distinct ones).

The product of its (nonzero) digits is 19840464, while the sum is 63.

The spelling of 43929799920 in words is "forty-three billion, nine hundred twenty-nine million, seven hundred ninety-nine thousand, nine hundred twenty".