28573651 has 4 divisors (see below), whose sum is σ = 30254472. Its totient is φ = 26892832.

The previous prime is 28573627. The next prime is 28573667. The reversal of 28573651 is 15637582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28573651 - 2¹⁹ = 28049363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28573651.

It is not an unprimeable number, because it can be changed into a prime (28573621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840385 + ... + 840418.

It is an arithmetic number, because the mean of its divisors is an integer number (7563618).

Almost surely, 2^28573651 is an apocalyptic number.

28573651 is a deficient number, since it is larger than the sum of its proper divisors (1680821).

28573651 is a wasteful number, since it uses less digits than its factorization.

28573651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680820.

The product of its digits is 50400, while the sum is 37.

The square root of 28573651 is about 5345.4327233630. The cubic root of 28573651 is about 305.7186350965.

The spelling of 28573651 in words is "twenty-eight million, five hundred seventy-three thousand, six hundred fifty-one".