28557498 has 8 divisors (see below), whose sum is σ = 57115008. Its totient is φ = 9519164.

The previous prime is 28557493. The next prime is 28557499. The reversal of 28557498 is 89475582.

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

28557498 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28557491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2379786 + ... + 2379797.

It is an arithmetic number, because the mean of its divisors is an integer number (7139376).

Almost surely, 2^28557498 is an apocalyptic number.

28557498 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28557498 is a wasteful number, since it uses less digits than its factorization.

28557498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4759588.

The product of its digits is 806400, while the sum is 48.

The square root of 28557498 is about 5343.9215937362. The cubic root of 28557498 is about 305.6610155323.

The spelling of 28557498 in words is "twenty-eight million, five hundred fifty-seven thousand, four hundred ninety-eight".