28072207 has 8 divisors (see below), whose sum is σ = 28901376. Its totient is φ = 27252792.

The previous prime is 28072201. The next prime is 28072211. The reversal of 28072207 is 70227082.

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 28072207 - 2¹⁵ = 28039439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28072201) 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 7 ways as a sum of consecutive naturals, for example, 3618 + ... + 8320.

It is an arithmetic number, because the mean of its divisors is an integer number (3612672).

Almost surely, 2^28072207 is an apocalyptic number.

28072207 is a deficient number, since it is larger than the sum of its proper divisors (829169).

28072207 is a wasteful number, since it uses less digits than its factorization.

28072207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 28072207 is about 5298.3211491943. The cubic root of 28072207 is about 303.9197004845.

Adding to 28072207 its reverse (70227082), we get a palindrome (98299289).

The spelling of 28072207 in words is "twenty-eight million, seventy-two thousand, two hundred seven".