28870187991330 has 64 divisors (see below), whose sum is σ = 79188889828608. Its totient is φ = 6598726072320.

The previous prime is 28870187991313. The next prime is 28870187991383. The reversal of 28870187991330 is 3319978107882.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 6253654 + ... + 9841166.

It is an arithmetic number, because the mean of its divisors is an integer number (1237326403572).

Almost surely, 2^{28870187991330} is an apocalyptic number.

28870187991330 is an abundant number, since it is smaller than the sum of its proper divisors (50318701837278).

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

28870187991330 is a wasteful number, since it uses less digits than its factorization.

28870187991330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3625851.

The product of its (nonzero) digits is 36578304, while the sum is 66.

The spelling of 28870187991330 in words is "twenty-eight trillion, eight hundred seventy billion, one hundred eighty-seven million, nine hundred ninety-one thousand, three hundred thirty".