43579980 has 72 divisors (see below), whose sum is σ = 133831152. Its totient is φ = 11477376.

The previous prime is 43579961. The next prime is 43579981. The reversal of 43579980 is 8997534.

43579980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (43579981) 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 23 ways as a sum of consecutive naturals, for example, 13482 + ... + 16398.

It is an arithmetic number, because the mean of its divisors is an integer number (1858766).

Almost surely, 2^43579980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43579980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66915576).

43579980 is an abundant number, since it is smaller than the sum of its proper divisors (90251172).

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

43579980 is a wasteful number, since it uses less digits than its factorization.

43579980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015 (or 3010 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 43579980 is about 6601.5134628356. The cubic root of 43579980 is about 351.9078938591.

The spelling of 43579980 in words is "forty-three million, five hundred seventy-nine thousand, nine hundred eighty".