28047745 has 8 divisors (see below), whose sum is σ = 36717120. Its totient is φ = 20398320.

The previous prime is 28047713. The next prime is 28047749. The reversal of 28047745 is 54774082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28047745 - 2⁵ = 28047713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28047749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254925 + ... + 255034.

It is an arithmetic number, because the mean of its divisors is an integer number (4589640).

Almost surely, 2^28047745 is an apocalyptic number.

It is an amenable number.

28047745 is a deficient number, since it is larger than the sum of its proper divisors (8669375).

28047745 is a wasteful number, since it uses less digits than its factorization.

28047745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509975.

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

The square root of 28047745 is about 5296.0121789890. The cubic root of 28047745 is about 303.8313967254.

The spelling of 28047745 in words is "twenty-eight million, forty-seven thousand, seven hundred forty-five".