28294007 has 4 divisors (see below), whose sum is σ = 32336016. Its totient is φ = 24252000.

The previous prime is 28293959. The next prime is 28294031. The reversal of 28294007 is 70049282.

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 28294007 - 2⁶ = 28293943 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 (28294037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2020994 + ... + 2021007.

It is an arithmetic number, because the mean of its divisors is an integer number (8084004).

Almost surely, 2^28294007 is an apocalyptic number.

28294007 is a deficient number, since it is larger than the sum of its proper divisors (4042009).

28294007 is an equidigital number, since it uses as much as digits as its factorization.

28294007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042008.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 28294007 is about 5319.2111257216. The cubic root of 28294007 is about 304.7180301838.

The spelling of 28294007 in words is "twenty-eight million, two hundred ninety-four thousand, seven".