28027771930 has 32 divisors (see below), whose sum is σ = 50712117120. Its totient is φ = 11152968000.

The previous prime is 28027771903. The next prime is 28027771979. The reversal of 28027771930 is 3917772082.

It is a happy 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 15 ways as a sum of consecutive naturals, for example, 2220076 + ... + 2232664.

It is an arithmetic number, because the mean of its divisors is an integer number (1584753660).

Almost surely, 2^28027771930 is an apocalyptic number.

28027771930 is a deficient number, since it is larger than the sum of its proper divisors (22684345190).

28027771930 is a wasteful number, since it uses less digits than its factorization.

28027771930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13734.

The product of its (nonzero) digits is 296352, while the sum is 46.

The spelling of 28027771930 in words is "twenty-eight billion, twenty-seven million, seven hundred seventy-one thousand, nine hundred thirty".