42686220 has 24 divisors (see below), whose sum is σ = 119521584. Its totient is φ = 11382976.

The previous prime is 42686209. The next prime is 42686227. The reversal of 42686220 is 2268624.

It is a super-3 number, since 3×42686220³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is not an unprimeable number, because it can be changed into a prime (42686227) 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, 355659 + ... + 355778.

It is an arithmetic number, because the mean of its divisors is an integer number (4980066).

Almost surely, 2^42686220 is an apocalyptic number.

It is an amenable number.

42686220 is an abundant number, since it is smaller than the sum of its proper divisors (76835364).

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

42686220 is a wasteful number, since it uses less digits than its factorization.

42686220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711449 (or 711447 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 42686220 is about 6533.4692162740. The cubic root of 42686220 is about 349.4855571486.

The spelling of 42686220 in words is "forty-two million, six hundred eighty-six thousand, two hundred twenty".