43579840 has 56 divisors (see below), whose sum is σ = 109892592. Its totient is φ = 16404480.

The previous prime is 43579817. The next prime is 43579847. The reversal of 43579840 is 4897534.

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

It is a junction number, because it is equal to n+sod(n) for n = 43579793 and 43579802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43579847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1435 + ... + 9445.

Almost surely, 2^43579840 is an apocalyptic number.

43579840 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 43579840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54946296).

43579840 is an abundant number, since it is smaller than the sum of its proper divisors (66312752).

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

43579840 is a wasteful number, since it uses less digits than its factorization.

43579840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8045 (or 8035 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 43579840 is about 6601.5028591980. The cubic root of 43579840 is about 351.9075170259.

The spelling of 43579840 in words is "forty-three million, five hundred seventy-nine thousand, eight hundred forty".