428668864 has 28 divisors (see below), whose sum is σ = 916075384. Its totient is φ = 197846784.

The previous prime is 428668853. The next prime is 428668897. The reversal of 428668864 is 468866824.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

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, 256782 + ... + 258445.

It is an arithmetic number, because the mean of its divisors is an integer number (32716978).

Almost surely, 2^428668864 is an apocalyptic number.

It is an amenable number.

428668864 is an abundant number, since it is smaller than the sum of its proper divisors (487406520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428668864 is a wasteful number, since it uses less digits than its factorization.

428668864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515252 (or 515242 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 52.

The square root of 428668864 is about 20704.3199357042. The cubic root of 428668864 is about 754.0045732824.

The spelling of 428668864 in words is "four hundred twenty-eight million, six hundred sixty-eight thousand, eight hundred sixty-four".