28782459 has 10 divisors (see below), whose sum is σ = 42996140. Its totient is φ = 19188252.

The previous prime is 28782449. The next prime is 28782461. The reversal of 28782459 is 95428782.

It is not a de Polignac number, because 28782459 - 2⁴ = 28782443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28782409) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 177589 + ... + 177750.

It is an arithmetic number, because the mean of its divisors is an integer number (4299614).

Almost surely, 2^28782459 is an apocalyptic number.

28782459 is a deficient number, since it is larger than the sum of its proper divisors (14213681).

28782459 is an equidigital number, since it uses as much as digits as its factorization.

28782459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355351 (or 355342 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 28782459 is about 5364.9286108950. The cubic root of 28782459 is about 306.4615296072.

It can be divided in two parts, 28782 and 459, that added together give a square (29241 = 171²).

The spelling of 28782459 in words is "twenty-eight million, seven hundred eighty-two thousand, four hundred fifty-nine".