428634366534 has 192 divisors, whose sum is σ = 1064063609856. Its totient is φ = 123570720000.

The previous prime is 428634366509. The next prime is 428634366551. The reversal of 428634366534 is 435663436824.

428634366534 is a `hidden beast` number, since 4 + 2 + 8 + 6 + 3 + 43 + 66 + 534 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 45444799 + ... + 45454229.

It is an arithmetic number, because the mean of its divisors is an integer number (5541997968).

Almost surely, 2^428634366534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428634366534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532031804928).

428634366534 is an abundant number, since it is smaller than the sum of its proper divisors (635429243322).

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

428634366534 is a wasteful number, since it uses less digits than its factorization.

428634366534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9635 (or 9632 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 54.

The spelling of 428634366534 in words is "four hundred twenty-eight billion, six hundred thirty-four million, three hundred sixty-six thousand, five hundred thirty-four".