28828457 has 8 divisors (see below), whose sum is σ = 33028800. Its totient is φ = 24648624.

The previous prime is 28828433. The next prime is 28828463. The reversal of 28828457 is 75482882.

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

It is not a de Polignac number, because 28828457 - 2¹⁴ = 28812073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28828057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1982 + ... + 7847.

It is an arithmetic number, because the mean of its divisors is an integer number (4128600).

Almost surely, 2^28828457 is an apocalyptic number.

It is an amenable number.

28828457 is a deficient number, since it is larger than the sum of its proper divisors (4200343).

28828457 is an equidigital number, since it uses as much as digits as its factorization.

28828457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10255.

The product of its digits is 286720, while the sum is 44.

The square root of 28828457 is about 5369.2138158207. The cubic root of 28828457 is about 306.6246974439.

The spelling of 28828457 in words is "twenty-eight million, eight hundred twenty-eight thousand, four hundred fifty-seven".