28787461 has 2 divisors, whose sum is σ = 28787462. Its totient is φ = 28787460.

The previous prime is 28787449. The next prime is 28787483. The reversal of 28787461 is 16478782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28196100 + 591361 = 5310^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 28787461 - 2¹⁹ = 28263173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28787491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14393730 + 14393731.

It is an arithmetic number, because the mean of its divisors is an integer number (14393731).

Almost surely, 2^28787461 is an apocalyptic number.

It is an amenable number.

28787461 is a deficient number, since it is larger than the sum of its proper divisors (1).

28787461 is an equidigital number, since it uses as much as digits as its factorization.

28787461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 43.

The square root of 28787461 is about 5365.3947664641. The cubic root of 28787461 is about 306.4792815278.

The spelling of 28787461 in words is "twenty-eight million, seven hundred eighty-seven thousand, four hundred sixty-one".