427706728 has 16 divisors (see below), whose sum is σ = 804808260. Its totient is φ = 213091200.

The previous prime is 427706707. The next prime is 427706731. The reversal of 427706728 is 827607724.

It can be written as a sum of positive squares in 2 ways, for example, as 425266884 + 2439844 = 20622^2 + 1562^2 .

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, 92883 + ... + 97378.

Almost surely, 2^427706728 is an apocalyptic number.

It is an amenable number.

427706728 is a deficient number, since it is larger than the sum of its proper divisors (377101532).

427706728 is a wasteful number, since it uses less digits than its factorization.

427706728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190548 (or 190544 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 43.

The square root of 427706728 is about 20681.0717323837. The cubic root of 427706728 is about 753.4400362254.

The spelling of 427706728 in words is "four hundred twenty-seven million, seven hundred six thousand, seven hundred twenty-eight".