28916207 has 4 divisors (see below), whose sum is σ = 28966056. Its totient is φ = 28866360.

The previous prime is 28916191. The next prime is 28916213. The reversal of 28916207 is 70261982.

It is a happy number.

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 28916207 - 2⁴ = 28916191 is a prime.

It is a super-2 number, since 2×28916207² = 1672294054533698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28916807) 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 3 ways as a sum of consecutive naturals, for example, 24044 + ... + 25217.

It is an arithmetic number, because the mean of its divisors is an integer number (7241514).

Almost surely, 2^28916207 is an apocalyptic number.

28916207 is a deficient number, since it is larger than the sum of its proper divisors (49849).

28916207 is an equidigital number, since it uses as much as digits as its factorization.

28916207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49848.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 28916207 is about 5377.3791943660. The cubic root of 28916207 is about 306.9354906244.

The spelling of 28916207 in words is "twenty-eight million, nine hundred sixteen thousand, two hundred seven".