28870469 has 2 divisors, whose sum is σ = 28870470. Its totient is φ = 28870468.

The previous prime is 28870463. The next prime is 28870477. The reversal of 28870469 is 96407882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25877569 + 2992900 = 5087^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 28870469 - 2¹⁶ = 28804933 is a prime.

It is a super-2 number, since 2×28870469² = 1667007960559922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28870463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14435234 + 14435235.

It is an arithmetic number, because the mean of its divisors is an integer number (14435235).

Almost surely, 2^28870469 is an apocalyptic number.

It is an amenable number.

28870469 is a deficient number, since it is larger than the sum of its proper divisors (1).

28870469 is an equidigital number, since it uses as much as digits as its factorization.

28870469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 28870469 is about 5373.1246961149. The cubic root of 28870469 is about 306.7735742314.

The spelling of 28870469 in words is "twenty-eight million, eight hundred seventy thousand, four hundred sixty-nine".