428775890 has 32 divisors (see below), whose sum is σ = 813697920. Its totient is φ = 162353664.

The previous prime is 428775889. The next prime is 428775917. The reversal of 428775890 is 98577824.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12701 + ... + 31919.

It is an arithmetic number, because the mean of its divisors is an integer number (25428060).

Almost surely, 2^428775890 is an apocalyptic number.

428775890 is a deficient number, since it is larger than the sum of its proper divisors (384922030).

428775890 is a wasteful number, since it uses less digits than its factorization.

428775890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19346.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The square root of 428775890 is about 20706.9044040871. The cubic root of 428775890 is about 754.0673189782.

The spelling of 428775890 in words is "four hundred twenty-eight million, seven hundred seventy-five thousand, eight hundred ninety".