42999220 has 48 divisors (see below), whose sum is σ = 99038016. Its totient is φ = 15552000.

The previous prime is 42999191. The next prime is 42999241. The reversal of 42999220 is 2299924.

It is a self number, because there is not a number n which added to its sum of digits gives 42999220.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 52615 + ... + 53425.

It is an arithmetic number, because the mean of its divisors is an integer number (2063292).

Almost surely, 2^42999220 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 42999220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49519008).

42999220 is an abundant number, since it is smaller than the sum of its proper divisors (56038796).

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

42999220 is a wasteful number, since it uses less digits than its factorization.

42999220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072 (or 1070 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 42999220 is about 6557.3790495899. The cubic root of 42999220 is about 350.3376876922.

The spelling of 42999220 in words is "forty-two million, nine hundred ninety-nine thousand, two hundred twenty".