28555147830 has 64 divisors (see below), whose sum is σ = 77340614400. Its totient is φ = 6683752320.

The previous prime is 28555147811. The next prime is 28555147853. The reversal of 28555147830 is 3874155582.

It is a self number, because there is not a number n which added to its sum of digits gives 28555147830.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1482340 + ... + 1501479.

It is an arithmetic number, because the mean of its divisors is an integer number (1208447100).

Almost surely, 2^28555147830 is an apocalyptic number.

28555147830 is an abundant number, since it is smaller than the sum of its proper divisors (48785466570).

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

28555147830 is a wasteful number, since it uses less digits than its factorization.

28555147830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2983869.

The product of its (nonzero) digits is 1344000, while the sum is 48.

The spelling of 28555147830 in words is "twenty-eight billion, five hundred fifty-five million, one hundred forty-seven thousand, eight hundred thirty".