428647870 has 32 divisors (see below), whose sum is σ = 884207808. Its totient is φ = 146562048.

The previous prime is 428647867. The next prime is 428647871. The reversal of 428647870 is 78746824.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 428647870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428647871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17902 + ... + 34318.

It is an arithmetic number, because the mean of its divisors is an integer number (27631494).

Almost surely, 2^428647870 is an apocalyptic number.

428647870 is an abundant number, since it is smaller than the sum of its proper divisors (455559938).

428647870 is a wasteful number, since it uses less digits than its factorization.

428647870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16804.

The product of its (nonzero) digits is 602112, while the sum is 46.

The square root of 428647870 is about 20703.8129338535. The cubic root of 428647870 is about 753.9922639906.

The spelling of 428647870 in words is "four hundred twenty-eight million, six hundred forty-seven thousand, eight hundred seventy".