28820207 has 8 divisors (see below), whose sum is σ = 32670960. Its totient is φ = 25202880.

The previous prime is 28820179. The next prime is 28820221. The reversal of 28820207 is 70202882.

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 28820207 - 2⁸ = 28819951 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 28820207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28820807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58094 + ... + 58587.

It is an arithmetic number, because the mean of its divisors is an integer number (4083870).

Almost surely, 2^28820207 is an apocalyptic number.

28820207 is a deficient number, since it is larger than the sum of its proper divisors (3850753).

28820207 is a wasteful number, since it uses less digits than its factorization.

28820207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116713.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 28820207 is about 5368.4454919464. The cubic root of 28820207 is about 306.5954451545.

The spelling of 28820207 in words is "twenty-eight million, eight hundred twenty thousand, two hundred seven".