43867440 has 160 divisors (see below), whose sum is σ = 157847040. Its totient is φ = 11176704.

The previous prime is 43867423. The next prime is 43867457. The reversal of 43867440 is 4476834.

43867440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (43867423) and next prime (43867457).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 43867395 and 43867404.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 49239 + ... + 50121.

It is an arithmetic number, because the mean of its divisors is an integer number (986544).

Almost surely, 2^43867440 is an apocalyptic number.

43867440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

43867440 is the 3312-nd decagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43867440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78923520).

43867440 is an abundant number, since it is smaller than the sum of its proper divisors (113979600).

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

43867440 is a wasteful number, since it uses less digits than its factorization.

43867440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 43867440 is about 6623.2499575360. The cubic root of 43867440 is about 352.6799443418.

The spelling of 43867440 in words is "forty-three million, eight hundred sixty-seven thousand, four hundred forty".