428578643652 has 24 divisors (see below), whose sum is σ = 1013715698016. Its totient is φ = 140902567488.

The previous prime is 428578643641. The next prime is 428578643653. The reversal of 428578643652 is 256346875824.

It is not an unprimeable number, because it can be changed into a prime (428578643653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244621638 + ... + 244623389.

It is an arithmetic number, because the mean of its divisors is an integer number (42238154084).

Almost surely, 2^428578643652 is an apocalyptic number.

It is an amenable number.

428578643652 is an abundant number, since it is smaller than the sum of its proper divisors (585137054364).

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

428578643652 is a wasteful number, since it uses less digits than its factorization.

428578643652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489245107 (or 489245105 counting only the distinct ones).

The product of its digits is 77414400, while the sum is 60.

The spelling of 428578643652 in words is "four hundred twenty-eight billion, five hundred seventy-eight million, six hundred forty-three thousand, six hundred fifty-two".