28546657 has 4 divisors (see below), whose sum is σ = 29787840. Its totient is φ = 27305476.

The previous prime is 28546633. The next prime is 28546663. The reversal of 28546657 is 75664582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28546657 - 2¹¹ = 28544609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28546667) 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, 620557 + ... + 620602.

It is an arithmetic number, because the mean of its divisors is an integer number (7446960).

Almost surely, 2^28546657 is an apocalyptic number.

It is an amenable number.

28546657 is a deficient number, since it is larger than the sum of its proper divisors (1241183).

28546657 is a wasteful number, since it uses less digits than its factorization.

28546657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241182.

The product of its digits is 403200, while the sum is 43.

The square root of 28546657 is about 5342.9071674511. The cubic root of 28546657 is about 305.6223322827.

The spelling of 28546657 in words is "twenty-eight million, five hundred forty-six thousand, six hundred fifty-seven".