428431064868 has 18 divisors (see below), whose sum is σ = 1082978525174. Its totient is φ = 142810354944.

The previous prime is 428431064857. The next prime is 428431064879. The reversal of 428431064868 is 868460134824.

It is a happy number.

428431064868 is a `hidden beast` number, since 4 + 284 + 310 + 6 + 48 + 6 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (428431064857) and next prime (428431064879).

It can be written as a sum of positive squares in only one way, i.e., 397331036964 + 31100027904 = 630342^2 + 176352^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5950431421 + ... + 5950431492.

Almost surely, 2^428431064868 is an apocalyptic number.

It is an amenable number.

428431064868 is an abundant number, since it is smaller than the sum of its proper divisors (654547460306).

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

428431064868 is a wasteful number, since it uses less digits than its factorization.

428431064868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11900862923 (or 11900862918 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 54.

The spelling of 428431064868 in words is "four hundred twenty-eight billion, four hundred thirty-one million, sixty-four thousand, eight hundred sixty-eight".