427221366 has 64 divisors (see below), whose sum is σ = 1047513600. Its totient is φ = 114301440.

The previous prime is 427221349. The next prime is 427221367. The reversal of 427221366 is 663122724.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427221367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8910 + ... + 30558.

It is an arithmetic number, because the mean of its divisors is an integer number (16367400).

Almost surely, 2^427221366 is an apocalyptic number.

427221366 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 427221366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523756800).

427221366 is an abundant number, since it is smaller than the sum of its proper divisors (620292234).

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

427221366 is a wasteful number, since it uses less digits than its factorization.

427221366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21701.

The product of its digits is 24192, while the sum is 33.

The square root of 427221366 is about 20669.3339515331. Note that the first 3 decimals coincide. The cubic root of 427221366 is about 753.1549268618.

The spelling of 427221366 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, three hundred sixty-six".