428183666 has 8 divisors (see below), whose sum is σ = 664423020. Its totient is φ = 206709328.

The previous prime is 428183653. The next prime is 428183683. The reversal of 428183666 is 666381824.

It can be written as a sum of positive squares in 2 ways, for example, as 393030625 + 35153041 = 19825^2 + 5929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3691181 + ... + 3691296.

Almost surely, 2^428183666 is an apocalyptic number.

428183666 is a deficient number, since it is larger than the sum of its proper divisors (236239354).

428183666 is a wasteful number, since it uses less digits than its factorization.

428183666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7382508.

The product of its digits is 331776, while the sum is 44.

The square root of 428183666 is about 20692.5993050656. The cubic root of 428183666 is about 753.7199871624.

The spelling of 428183666 in words is "four hundred twenty-eight million, one hundred eighty-three thousand, six hundred sixty-six".