28781536953 has 8 divisors (see below), whose sum is σ = 41327335168. Its totient is φ = 17711715024.

The previous prime is 28781536943. The next prime is 28781536981. The reversal of 28781536953 is 35963518782.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28781536953 - 2⁴ = 28781536937 is a prime.

It is a super-4 number, since 4×28781536953⁴ (a number of 43 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28781536893 and 28781536902.

It is not an unprimeable number, because it can be changed into a prime (28781536913) 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 7 ways as a sum of consecutive naturals, for example, 368994025 + ... + 368994102.

It is an arithmetic number, because the mean of its divisors is an integer number (5165916896).

Almost surely, 2^28781536953 is an apocalyptic number.

It is an amenable number.

28781536953 is a deficient number, since it is larger than the sum of its proper divisors (12545798215).

28781536953 is a wasteful number, since it uses less digits than its factorization.

28781536953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737988143.

The product of its digits is 10886400, while the sum is 57.

The spelling of 28781536953 in words is "twenty-eight billion, seven hundred eighty-one million, five hundred thirty-six thousand, nine hundred fifty-three".