28293307 has 8 divisors (see below), whose sum is σ = 32530176. Its totient is φ = 24105192.

The previous prime is 28293301. The next prime is 28293313. The reversal of 28293307 is 70339282.

It is an interprime number because it is at equal distance from previous prime (28293301) and next prime (28293313).

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 28293307 - 2¹¹ = 28291259 is a prime.

It is a super-2 number, since 2×28293307² = 1601022441992498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28293301) 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 7 ways as a sum of consecutive naturals, for example, 10933 + ... + 13270.

It is an arithmetic number, because the mean of its divisors is an integer number (4066272).

Almost surely, 2^28293307 is an apocalyptic number.

28293307 is a deficient number, since it is larger than the sum of its proper divisors (4236869).

28293307 is a wasteful number, since it uses less digits than its factorization.

28293307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24377.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 28293307 is about 5319.1453260839. The cubic root of 28293307 is about 304.7155172325.

The spelling of 28293307 in words is "twenty-eight million, two hundred ninety-three thousand, three hundred seven".