43669980 has 108 divisors (see below), whose sum is σ = 140682360. Its totient is φ = 10934784.

The previous prime is 43669973. The next prime is 43669981. The reversal of 43669980 is 8996634.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43669981) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 386404 + ... + 386516.

Almost surely, 2^43669980 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 43669980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70341180).

43669980 is an abundant number, since it is smaller than the sum of its proper divisors (97012380).

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

43669980 is a wasteful number, since it uses less digits than its factorization.

43669980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 43669980 is about 6608.3265657805. The cubic root of 43669980 is about 352.1499769820.

The spelling of 43669980 in words is "forty-three million, six hundred sixty-nine thousand, nine hundred eighty".