427729218 has 32 divisors (see below), whose sum is σ = 981780480. Its totient is φ = 121694160.

The previous prime is 427729217. The next prime is 427729223. The reversal of 427729218 is 812927724.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 427729218.

It is not an unprimeable number, because it can be changed into a prime (427729217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11268 + ... + 31343.

It is an arithmetic number, because the mean of its divisors is an integer number (30680640).

Almost surely, 2^427729218 is an apocalyptic number.

427729218 is an abundant number, since it is smaller than the sum of its proper divisors (554051262).

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

427729218 is a wasteful number, since it uses less digits than its factorization.

427729218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42862.

The product of its digits is 112896, while the sum is 42.

The square root of 427729218 is about 20681.6154591463. The cubic root of 427729218 is about 753.4532419793.

The spelling of 427729218 in words is "four hundred twenty-seven million, seven hundred twenty-nine thousand, two hundred eighteen".