28727049 has 16 divisors (see below), whose sum is σ = 42581504. Its totient is φ = 17107200.

The previous prime is 28727029. The next prime is 28727057. The reversal of 28727049 is 94072782.

It is not a de Polignac number, because 28727049 - 2⁷ = 28726921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28726998 and 28727016.

It is not an unprimeable number, because it can be changed into a prime (28727029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10672 + ... + 13089.

It is an arithmetic number, because the mean of its divisors is an integer number (2661344).

Almost surely, 2^28727049 is an apocalyptic number.

It is an amenable number.

28727049 is a deficient number, since it is larger than the sum of its proper divisors (13854455).

28727049 is a wasteful number, since it uses less digits than its factorization.

28727049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23808.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 28727049 is about 5359.7620282994. The cubic root of 28727049 is about 306.2647437578.

The spelling of 28727049 in words is "twenty-eight million, seven hundred twenty-seven thousand, forty-nine".