43984980 has 72 divisors (see below), whose sum is σ = 143691912. Its totient is φ = 10826496.

The previous prime is 43984979. The next prime is 43984987. The reversal of 43984980 is 8948934.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3992004 + 39992976 = 1998^2 + 6324^2 .

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 (43984987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7059 + ... + 11738.

It is an arithmetic number, because the mean of its divisors is an integer number (1995721).

Almost surely, 2^43984980 is an apocalyptic number.

It is an amenable number.

43984980 is an abundant number, since it is smaller than the sum of its proper divisors (99706932).

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

43984980 is a wasteful number, since it uses less digits than its factorization.

43984980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18825 (or 18820 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 43984980 is about 6632.1173089746. The cubic root of 43984980 is about 352.9946578759.

The spelling of 43984980 in words is "forty-three million, nine hundred eighty-four thousand, nine hundred eighty".