28977257536 has 14 divisors (see below), whose sum is σ = 57501745550. Its totient is φ = 14488628736.

The previous prime is 28977257497. The next prime is 28977257587. The reversal of 28977257536 is 63575277982.

It can be written as a sum of positive squares in only one way, i.e., 21152793600 + 7824463936 = 145440^2 + 88456^2 .

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 as a sum of consecutive naturals, namely, 226384761 + ... + 226384888.

Almost surely, 2^28977257536 is an apocalyptic number.

It is an amenable number.

28977257536 is a deficient number, since it is larger than the sum of its proper divisors (28524488014).

28977257536 is an equidigital number, since it uses as much as digits as its factorization.

28977257536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452769661 (or 452769651 counting only the distinct ones).

The product of its digits is 44452800, while the sum is 61.

The spelling of 28977257536 in words is "twenty-eight billion, nine hundred seventy-seven million, two hundred fifty-seven thousand, five hundred thirty-six".