28282557 has 8 divisors (see below), whose sum is σ = 38056480. Its totient is φ = 18681840.

The previous prime is 28282547. The next prime is 28282567. The reversal of 28282557 is 75528282.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28282547) and next prime (28282567).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28282557 - 2⁶ = 28282493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28282547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42919 + ... + 43572.

It is an arithmetic number, because the mean of its divisors is an integer number (4757060).

Almost surely, 2^28282557 is an apocalyptic number.

It is an amenable number.

28282557 is a deficient number, since it is larger than the sum of its proper divisors (9773923).

28282557 is a wasteful number, since it uses less digits than its factorization.

28282557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86603.

The product of its digits is 89600, while the sum is 39.

The square root of 28282557 is about 5318.1347293953. The cubic root of 28282557 is about 304.6769202743.

The spelling of 28282557 in words is "twenty-eight million, two hundred eighty-two thousand, five hundred fifty-seven".