428607290 has 16 divisors (see below), whose sum is σ = 786050568. Its totient is φ = 168207936.

The previous prime is 428607287. The next prime is 428607299. The reversal of 428607290 is 92706824.

It can be written as a sum of positive squares in 4 ways, for example, as 276257641 + 152349649 = 16621^2 + 12343^2 .

It is a super-2 number, since 2×428607290² = 367408418082288200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (428607299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403817 + ... + 404876.

Almost surely, 2^428607290 is an apocalyptic number.

428607290 is a deficient number, since it is larger than the sum of its proper divisors (357443278).

428607290 is a wasteful number, since it uses less digits than its factorization.

428607290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808753.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 428607290 is about 20702.8328979394. The cubic root of 428607290 is about 753.9684698122.

The spelling of 428607290 in words is "four hundred twenty-eight million, six hundred seven thousand, two hundred ninety".