43842820 has 24 divisors (see below), whose sum is σ = 105223104. Its totient is φ = 15031776.

The previous prime is 43842811. The next prime is 43842829. The reversal of 43842820 is 2824834.

43842820 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 (43842811) and next prime (43842829).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (43842829) 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 7 ways as a sum of consecutive naturals, for example, 156442 + ... + 156721.

It is an arithmetic number, because the mean of its divisors is an integer number (4384296).

Almost surely, 2^43842820 is an apocalyptic number.

It is an amenable number.

43842820 is an abundant number, since it is smaller than the sum of its proper divisors (61380284).

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

43842820 is a wasteful number, since it uses less digits than its factorization.

43842820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313179 (or 313177 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 43842820 is about 6621.3910925122. The cubic root of 43842820 is about 352.6139530649.

The spelling of 43842820 in words is "forty-three million, eight hundred forty-two thousand, eight hundred twenty".