28016707 has 4 divisors (see below), whose sum is σ = 28049320. Its totient is φ = 27984096.

The previous prime is 28016699. The next prime is 28016711. The reversal of 28016707 is 70761082.

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 28016707 - 2³ = 28016699 is a prime.

It is a super-2 number, since 2×28016707² = 1569871742247698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28016207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14982 + ... + 16747.

It is an arithmetic number, because the mean of its divisors is an integer number (7012330).

Almost surely, 2^28016707 is an apocalyptic number.

28016707 is a deficient number, since it is larger than the sum of its proper divisors (32613).

28016707 is an equidigital number, since it uses as much as digits as its factorization.

28016707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32612.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 28016707 is about 5293.0810498234. The cubic root of 28016707 is about 303.7192807650.

Adding to 28016707 its reverse (70761082), we get a palindrome (98777789).

The spelling of 28016707 in words is "twenty-eight million, sixteen thousand, seven hundred seven".