28287017386 has 4 divisors (see below), whose sum is σ = 42430526082. Its totient is φ = 14143508692.

The previous prime is 28287017329. The next prime is 28287017387. The reversal of 28287017386 is 68371078282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20130218161 + 8156799225 = 141881^2 + 90315^2 .

It is not an unprimeable number, because it can be changed into a prime (28287017387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7071754345 + ... + 7071754348.

Almost surely, 2^28287017386 is an apocalyptic number.

28287017386 is a deficient number, since it is larger than the sum of its proper divisors (14143508696).

28287017386 is a wasteful number, since it uses less digits than its factorization.

28287017386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14143508695.

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 28287017386 in words is "twenty-eight billion, two hundred eighty-seven million, seventeen thousand, three hundred eighty-six".