28508712670990 has 32 divisors (see below), whose sum is σ = 53789779856736. Its totient is φ = 10866622179840.

The previous prime is 28508712670871. The next prime is 28508712671063. The reversal of 28508712670990 is 9907621780582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 808510807 + ... + 808546066.

It is an arithmetic number, because the mean of its divisors is an integer number (1680930620523).

Almost surely, 2^{28508712670990} is an apocalyptic number.

28508712670990 is a deficient number, since it is larger than the sum of its proper divisors (25281067185746).

28508712670990 is a wasteful number, since it uses less digits than its factorization.

28508712670990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617056964.

The product of its (nonzero) digits is 30481920, while the sum is 64.

The spelling of 28508712670990 in words is "twenty-eight trillion, five hundred eight billion, seven hundred twelve million, six hundred seventy thousand, nine hundred ninety".