43478820 has 144 divisors (see below), whose sum is σ = 164481408. Its totient is φ = 9031680.

The previous prime is 43478797. The next prime is 43478839. The reversal of 43478820 is 2887434.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12292 + ... + 15428.

It is an arithmetic number, because the mean of its divisors is an integer number (1142232).

Almost surely, 2^43478820 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 43478820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82240704).

43478820 is an abundant number, since it is smaller than the sum of its proper divisors (121002588).

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

43478820 is a wasteful number, since it uses less digits than its factorization.

43478820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170 (or 3165 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 43478820 is about 6593.8471319860. The cubic root of 43478820 is about 351.6353942478.

The spelling of 43478820 in words is "forty-three million, four hundred seventy-eight thousand, eight hundred twenty".