43720233705 has 32 divisors (see below), whose sum is σ = 78451286400. Its totient is φ = 23099530176.

The previous prime is 43720233691. The next prime is 43720233707. The reversal of 43720233705 is 50733202734.

It is not a de Polignac number, because 43720233705 - 2³² = 39425266409 is a prime.

It is a super-2 number, since 2×43720233705² (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 43720233705.

It is not an unprimeable number, because it can be changed into a prime (43720233707) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1498890 + ... + 1527779.

It is an arithmetic number, because the mean of its divisors is an integer number (2451602700).

Almost surely, 2^43720233705 is an apocalyptic number.

43720233705 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43720233705 is a deficient number, since it is larger than the sum of its proper divisors (34731052695).

43720233705 is a wasteful number, since it uses less digits than its factorization.

43720233705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026790 (or 3026784 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 36.

The spelling of 43720233705 in words is "forty-three billion, seven hundred twenty million, two hundred thirty-three thousand, seven hundred five".