28761401 has 2 divisors, whose sum is σ = 28761402. Its totient is φ = 28761400.

The previous prime is 28761391. The next prime is 28761407. The reversal of 28761401 is 10416782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24245776 + 4515625 = 4924^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 28761401 - 2¹⁰ = 28760377 is a prime.

It is not a weakly prime, because it can be changed into another prime (28761407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14380700 + 14380701.

It is an arithmetic number, because the mean of its divisors is an integer number (14380701).

Almost surely, 2^28761401 is an apocalyptic number.

It is an amenable number.

28761401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28761401 is an equidigital number, since it uses as much as digits as its factorization.

28761401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 28761401 is about 5362.9656907349. The cubic root of 28761401 is about 306.3867729487.

The spelling of 28761401 in words is "twenty-eight million, seven hundred sixty-one thousand, four hundred one".