28836240981 has 16 divisors (see below), whose sum is σ = 38606540544. Its totient is φ = 19145121984.

The previous prime is 28836240947. The next prime is 28836240989. The reversal of 28836240981 is 18904263882.

It is not a de Polignac number, because 28836240981 - 2²⁹ = 28299370069 is a prime.

It is a super-2 number, since 2×28836240981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28836240989) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1892911 + ... + 1908083.

It is an arithmetic number, because the mean of its divisors is an integer number (2412908784).

Almost surely, 2^28836240981 is an apocalyptic number.

It is an amenable number.

28836240981 is a deficient number, since it is larger than the sum of its proper divisors (9770299563).

28836240981 is a wasteful number, since it uses less digits than its factorization.

28836240981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17740.

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 28836240981 in words is "twenty-eight billion, eight hundred thirty-six million, two hundred forty thousand, nine hundred eighty-one".