28754047 has 4 divisors (see below), whose sum is σ = 32861776. Its totient is φ = 24646320.

The previous prime is 28754041. The next prime is 28754111. The reversal of 28754047 is 74045782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74045782 = 2 ⋅37022891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28754047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28753997 and 28754015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28754041) 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, 2053854 + ... + 2053867.

It is an arithmetic number, because the mean of its divisors is an integer number (8215444).

Almost surely, 2^28754047 is an apocalyptic number.

28754047 is a deficient number, since it is larger than the sum of its proper divisors (4107729).

28754047 is an equidigital number, since it uses as much as digits as its factorization.

28754047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107728.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 28754047 is about 5362.2800187980. The cubic root of 28754047 is about 306.3606573874.

The spelling of 28754047 in words is "twenty-eight million, seven hundred fifty-four thousand, forty-seven".