28287012361 has 2 divisors, whose sum is σ = 28287012362. Its totient is φ = 28287012360.

The previous prime is 28287012353. The next prime is 28287012431. The reversal of 28287012361 is 16321078282.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24167811600 + 4119200761 = 155460^2 + 64181^2 .

It is a cyclic number.

It is not a de Polignac number, because 28287012361 - 2³ = 28287012353 is a prime.

It is a super-2 number, since 2×28287012361² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28287012161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14143506180 + 14143506181.

It is an arithmetic number, because the mean of its divisors is an integer number (14143506181).

Almost surely, 2^28287012361 is an apocalyptic number.

It is an amenable number.

28287012361 is a deficient number, since it is larger than the sum of its proper divisors (1).

28287012361 is an equidigital number, since it uses as much as digits as its factorization.

28287012361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 28287012361 in words is "twenty-eight billion, two hundred eighty-seven million, twelve thousand, three hundred sixty-one".