427221672 has 16 divisors (see below), whose sum is σ = 1068054240. Its totient is φ = 142407216.

The previous prime is 427221661. The next prime is 427221673. The reversal of 427221672 is 276122724.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (427221673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8900428 + ... + 8900475.

It is an arithmetic number, because the mean of its divisors is an integer number (66753390).

Almost surely, 2^427221672 is an apocalyptic number.

It is an amenable number.

427221672 is an abundant number, since it is smaller than the sum of its proper divisors (640832568).

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

427221672 is a wasteful number, since it uses less digits than its factorization.

427221672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17800912 (or 17800908 counting only the distinct ones).

The product of its digits is 18816, while the sum is 33.

The square root of 427221672 is about 20669.3413538023. The cubic root of 427221672 is about 753.1551066791.

The spelling of 427221672 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, six hundred seventy-two".