28485821 has 8 divisors (see below), whose sum is σ = 35059584. Its totient is φ = 22538160.

The previous prime is 28485811. The next prime is 28485851. The reversal of 28485821 is 12858482.

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

It is a cyclic number.

It is not a de Polignac number, because 28485821 - 2⁶ = 28485757 is a prime.

It is a super-2 number, since 2×28485821² = 1622883996088082, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28485811) 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, 156425 + ... + 156606.

It is an arithmetic number, because the mean of its divisors is an integer number (4382448).

Almost surely, 2^28485821 is an apocalyptic number.

It is an amenable number.

28485821 is a deficient number, since it is larger than the sum of its proper divisors (6573763).

28485821 is a wasteful number, since it uses less digits than its factorization.

28485821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313051.

The product of its digits is 40960, while the sum is 38.

The square root of 28485821 is about 5337.2109757813. The cubic root of 28485821 is about 305.4050731754.

The spelling of 28485821 in words is "twenty-eight million, four hundred eighty-five thousand, eight hundred twenty-one".