43297920 has 96 divisors (see below), whose sum is σ = 149533020. Its totient is φ = 11544576.

The previous prime is 43297909. The next prime is 43297949. The reversal of 43297920 is 2979234.

It can be written as a sum of positive squares in 2 ways, for example, as 41679936 + 1617984 = 6456^2 + 1272^2 .

It is a tau number, because it is divible by the number of its divisors (96).

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 11 ways as a sum of consecutive naturals, for example, 2002 + ... + 9518.

Almost surely, 2^43297920 is an apocalyptic number.

43297920 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 43297920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74766510).

43297920 is an abundant number, since it is smaller than the sum of its proper divisors (106235100).

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

43297920 is a wasteful number, since it uses less digits than its factorization.

43297920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7542 (or 7527 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 43297920 is about 6580.1155005061. The cubic root of 43297920 is about 351.1470394730.

The spelling of 43297920 in words is "forty-three million, two hundred ninety-seven thousand, nine hundred twenty".