43985920 has 132 divisors (see below), whose sum is σ = 117612432. Its totient is φ = 15769600.

The previous prime is 43985899. The next prime is 43985927. The reversal of 43985920 is 2958934.

It is a happy number.

It is a super-2 number, since 2×43985920² = 3869522316492800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (43985927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 619485 + ... + 619555.

Almost surely, 2^43985920 is an apocalyptic number.

43985920 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 43985920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58806216).

43985920 is an abundant number, since it is smaller than the sum of its proper divisors (73626512).

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

43985920 is a wasteful number, since it uses less digits than its factorization.

43985920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 43985920 is about 6632.1881758587. The cubic root of 43985920 is about 352.9971724662.

The spelling of 43985920 in words is "forty-three million, nine hundred eighty-five thousand, nine hundred twenty".