427665330 has 48 divisors (see below), whose sum is σ = 1117620504. Its totient is φ = 113460480.

The previous prime is 427665323. The next prime is 427665341. The reversal of 427665330 is 33566724.

It can be written as a sum of positive squares in 4 ways, for example, as 400760361 + 26904969 = 20019^2 + 5187^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5670 + ... + 29790.

Almost surely, 2^427665330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 427665330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (558810252).

427665330 is an abundant number, since it is smaller than the sum of its proper divisors (689955174).

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

427665330 is a wasteful number, since it uses less digits than its factorization.

427665330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24331 (or 24328 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The square root of 427665330 is about 20680.0708412713. The cubic root of 427665330 is about 753.4157267980.

The spelling of 427665330 in words is "four hundred twenty-seven million, six hundred sixty-five thousand, three hundred thirty".