43820920 has 128 divisors (see below), whose sum is σ = 119024640. Its totient is φ = 14307840.

The previous prime is 43820891. The next prime is 43820927. The reversal of 43820920 is 2902834.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43820927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 268759 + ... + 268921.

It is an arithmetic number, because the mean of its divisors is an integer number (929880).

Almost surely, 2^43820920 is an apocalyptic number.

43820920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43820920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59512320).

43820920 is an abundant number, since it is smaller than the sum of its proper divisors (75203720).

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

43820920 is a wasteful number, since it uses less digits than its factorization.

43820920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 43820920 is about 6619.7371549028. The cubic root of 43820920 is about 352.5552316923. Note that the first 3 decimals are identical.

The spelling of 43820920 in words is "forty-three million, eight hundred twenty thousand, nine hundred twenty".