43478920 has 32 divisors (see below), whose sum is σ = 98017920. Its totient is φ = 17357760.

The previous prime is 43478887. The next prime is 43478923. The reversal of 43478920 is 2987434.

It is a happy number.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 43478920.

It is not an unprimeable number, because it can be changed into a prime (43478923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34705 + ... + 35935.

It is an arithmetic number, because the mean of its divisors is an integer number (3063060).

Almost surely, 2^43478920 is an apocalyptic number.

43478920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43478920 is an abundant number, since it is smaller than the sum of its proper divisors (54539000).

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

43478920 is a wasteful number, since it uses less digits than its factorization.

43478920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125 (or 2121 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 43478920 is about 6593.8547148083. The cubic root of 43478920 is about 351.6356638312.

The spelling of 43478920 in words is "forty-three million, four hundred seventy-eight thousand, nine hundred twenty".