28745347 has 6 divisors (see below), whose sum is σ = 30338268. Its totient is φ = 27232092.

The previous prime is 28745333. The next prime is 28745357. The reversal of 28745347 is 74354782.

It is not a de Polignac number, because 28745347 - 2⁷ = 28745219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28745357) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39453 + ... + 40174.

It is an arithmetic number, because the mean of its divisors is an integer number (5056378).

Almost surely, 2^28745347 is an apocalyptic number.

28745347 is a deficient number, since it is larger than the sum of its proper divisors (1592921).

28745347 is an equidigital number, since it uses as much as digits as its factorization.

28745347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79665 (or 79646 counting only the distinct ones).

The product of its digits is 188160, while the sum is 40.

The square root of 28745347 is about 5361.4687353374. The cubic root of 28745347 is about 306.3297561537.

It can be divided in two parts, 28745 and 347, that added together give a palindrome (29092).

The spelling of 28745347 in words is "twenty-eight million, seven hundred forty-five thousand, three hundred forty-seven".