427641220 has 24 divisors (see below), whose sum is σ = 909417600. Its totient is φ = 168890592.

The previous prime is 427641197. The next prime is 427641257. The reversal of 427641220 is 22146724.

It is a happy number.

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, 133750 + ... + 136909.

It is an arithmetic number, because the mean of its divisors is an integer number (37892400).

Almost surely, 2^427641220 is an apocalyptic number.

It is an amenable number.

427641220 is an abundant number, since it is smaller than the sum of its proper divisors (481776380).

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

427641220 is a wasteful number, since it uses less digits than its factorization.

427641220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270747 (or 270745 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 427641220 is about 20679.4879046847. The cubic root of 427641220 is about 753.4015683792.

Adding to 427641220 its reverse (22146724), we get a palindrome (449787944).

The spelling of 427641220 in words is "four hundred twenty-seven million, six hundred forty-one thousand, two hundred twenty".