28187900753 has 4 divisors (see below), whose sum is σ = 29846012580. Its totient is φ = 26529788928.

The previous prime is 28187900749. The next prime is 28187900773. The reversal of 28187900753 is 35700978182.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8838256144 + 19349644609 = 94012^2 + 139103^2 .

It is a cyclic number.

It is not a de Polignac number, because 28187900753 - 2² = 28187900749 is a prime.

It is a super-3 number, since 3×28187900753³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28187900773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829055888 + ... + 829055921.

It is an arithmetic number, because the mean of its divisors is an integer number (7461503145).

Almost surely, 2^28187900753 is an apocalyptic number.

It is an amenable number.

28187900753 is a deficient number, since it is larger than the sum of its proper divisors (1658111827).

28187900753 is a wasteful number, since it uses less digits than its factorization.

28187900753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658111826.

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 28187900753 in words is "twenty-eight billion, one hundred eighty-seven million, nine hundred thousand, seven hundred fifty-three".