43720830 has 64 divisors (see below), whose sum is σ = 117702720. Its totient is φ = 11547648.

The previous prime is 43720823. The next prime is 43720837. The reversal of 43720830 is 3802734.

43720830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (43720823) and next prime (43720837).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 43720794 and 43720803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43720837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29794 + ... + 31226.

It is an arithmetic number, because the mean of its divisors is an integer number (1839105).

Almost surely, 2^43720830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43720830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58851360).

43720830 is an abundant number, since it is smaller than the sum of its proper divisors (73981890).

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

43720830 is a wasteful number, since it uses less digits than its factorization.

43720830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562 (or 1556 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 43720830 is about 6612.1728652539. The cubic root of 43720830 is about 352.2866069239.

The spelling of 43720830 in words is "forty-three million, seven hundred twenty thousand, eight hundred thirty".