28986449 has 2 divisors, whose sum is σ = 28986450. Its totient is φ = 28986448.

The previous prime is 28986427. The next prime is 28986469. The reversal of 28986449 is 94468982.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14961424 + 14025025 = 3868^2 + 3745^2 .

It is a cyclic number.

It is not a de Polignac number, because 28986449 - 2²⁰ = 27937873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28986397 and 28986406.

It is not a weakly prime, because it can be changed into another prime (28986469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14493224 + 14493225.

It is an arithmetic number, because the mean of its divisors is an integer number (14493225).

Almost surely, 2^28986449 is an apocalyptic number.

It is an amenable number.

28986449 is a deficient number, since it is larger than the sum of its proper divisors (1).

28986449 is an equidigital number, since it uses as much as digits as its factorization.

28986449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 50.

The square root of 28986449 is about 5383.9064813572. The cubic root of 28986449 is about 307.1838211299.

The spelling of 28986449 in words is "twenty-eight million, nine hundred eighty-six thousand, four hundred forty-nine".