42918220 has 24 divisors (see below), whose sum is σ = 90821808. Its totient is φ = 17035200.

The previous prime is 42918199. The next prime is 42918263. The reversal of 42918220 is 2281924.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5571 + ... + 10810.

It is an arithmetic number, because the mean of its divisors is an integer number (3784242).

Almost surely, 2^42918220 is an apocalyptic number.

It is an amenable number.

42918220 is an abundant number, since it is smaller than the sum of its proper divisors (47903588).

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

42918220 is a wasteful number, since it uses less digits than its factorization.

42918220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16521 (or 16519 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 42918220 is about 6551.1998900965. The cubic root of 42918220 is about 350.1175659470.

The spelling of 42918220 in words is "forty-two million, nine hundred eighteen thousand, two hundred twenty".