43823640 has 192 divisors, whose sum is σ = 158824800. Its totient is φ = 9633792.

The previous prime is 43823627. The next prime is 43823641. The reversal of 43823640 is 4632834.

It is a super-2 number, since 2×43823640² = 3841022845699200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 43823598 and 43823607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43823641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 170392 + ... + 170648.

Almost surely, 2^43823640 is an apocalyptic number.

43823640 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 43823640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79412400).

43823640 is an abundant number, since it is smaller than the sum of its proper divisors (115001160).

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

43823640 is a wasteful number, since it uses less digits than its factorization.

43823640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 43823640 is about 6619.9425979384. The cubic root of 43823640 is about 352.5625260043.

The spelling of 43823640 in words is "forty-three million, eight hundred twenty-three thousand, six hundred forty".