28746307 has 4 divisors (see below), whose sum is σ = 28786576. Its totient is φ = 28706040.

The previous prime is 28746257. The next prime is 28746313. The reversal of 28746307 is 70364782.

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 28746307 - 2¹¹ = 28744259 is a prime.

It is a super-3 number, since 3×28746307³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28746397) 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, 19044 + ... + 20497.

It is an arithmetic number, because the mean of its divisors is an integer number (7196644).

Almost surely, 2^28746307 is an apocalyptic number.

28746307 is a deficient number, since it is larger than the sum of its proper divisors (40269).

28746307 is an equidigital number, since it uses as much as digits as its factorization.

28746307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40268.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 28746307 is about 5361.5582622965. The cubic root of 28746307 is about 306.3331662510. Note that the first 3 decimals are identical.

The spelling of 28746307 in words is "twenty-eight million, seven hundred forty-six thousand, three hundred seven".