427221680 has 40 divisors (see below), whose sum is σ = 994207200. Its totient is φ = 170731008.

The previous prime is 427221677. The next prime is 427221731. The reversal of 427221680 is 86122724.

It is a tau number, because it is divible by the number of its divisors (40).

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, 127061 + ... + 130379.

It is an arithmetic number, because the mean of its divisors is an integer number (24855180).

Almost surely, 2^427221680 is an apocalyptic number.

427221680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

427221680 is an abundant number, since it is smaller than the sum of its proper divisors (566985520).

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

427221680 is a wasteful number, since it uses less digits than its factorization.

427221680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4941 (or 4935 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 427221680 is about 20669.3415473256. The cubic root of 427221680 is about 753.1551113802.

It can be divided in two parts, 4272 and 21680, that added together give a palindrome (25952).

The spelling of 427221680 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, six hundred eighty".