43997856 has 96 divisors (see below), whose sum is σ = 133031808. Its totient is φ = 12472320.

The previous prime is 43997851. The next prime is 43997857. The reversal of 43997856 is 65879934.

43997856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×43997856² = 3871622665193472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43997799 and 43997808.

It is not an unprimeable number, because it can be changed into a prime (43997851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156436 + ... + 156716.

It is an arithmetic number, because the mean of its divisors is an integer number (1385748).

Almost surely, 2^43997856 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 43997856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66515904).

43997856 is an abundant number, since it is smaller than the sum of its proper divisors (89033952).

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

43997856 is a wasteful number, since it uses less digits than its factorization.

43997856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 526 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The square root of 43997856 is about 6633.0879686614. The cubic root of 43997856 is about 353.0290992979.

The spelling of 43997856 in words is "forty-three million, nine hundred ninety-seven thousand, eight hundred fifty-six".