421227660 has 96 divisors (see below), whose sum is σ = 1368138240. Its totient is φ = 94837248.

The previous prime is 421227629. The next prime is 421227673. The reversal of 421227660 is 66722124.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20656 + ... + 35624.

It is an arithmetic number, because the mean of its divisors is an integer number (14251440).

Almost surely, 2^421227660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421227660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (684069120).

421227660 is an abundant number, since it is smaller than the sum of its proper divisors (946910580).

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

421227660 is a wasteful number, since it uses less digits than its factorization.

421227660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15055 (or 15053 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 421227660 is about 20523.8315136331. The cubic root of 421227660 is about 749.6161947360.

Adding to 421227660 its reverse (66722124), we get a palindrome (487949784).

The spelling of 421227660 in words is "four hundred twenty-one million, two hundred twenty-seven thousand, six hundred sixty".