28088007 has 4 divisors (see below), whose sum is σ = 37450680. Its totient is φ = 18725336.

The previous prime is 28088003. The next prime is 28088009. The reversal of 28088007 is 70088082.

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 28088007 - 2² = 28088003 is a prime.

It is a super-2 number, since 2×28088007² = 1577872274464098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28088003) 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, 4681332 + ... + 4681337.

It is an arithmetic number, because the mean of its divisors is an integer number (9362670).

Almost surely, 2^28088007 is an apocalyptic number.

28088007 is a deficient number, since it is larger than the sum of its proper divisors (9362673).

28088007 is an equidigital number, since it uses as much as digits as its factorization.

28088007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9362672.

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 28088007 is about 5299.8119777969. The cubic root of 28088007 is about 303.9767085976.

The spelling of 28088007 in words is "twenty-eight million, eighty-eight thousand, seven".