28767049 has 4 divisors (see below), whose sum is σ = 28788480. Its totient is φ = 28745620.

The previous prime is 28767047. The next prime is 28767059. The reversal of 28767049 is 94076782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94076782 = 2 ⋅47038391.

It is a cyclic number.

It is not a de Polignac number, because 28767049 - 2¹ = 28767047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28766996 and 28767014.

It is not an unprimeable number, because it can be changed into a prime (28767041) 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, 8557 + ... + 11434.

It is an arithmetic number, because the mean of its divisors is an integer number (7197120).

Almost surely, 2^28767049 is an apocalyptic number.

It is an amenable number.

28767049 is a deficient number, since it is larger than the sum of its proper divisors (21431).

28767049 is a wasteful number, since it uses less digits than its factorization.

28767049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21430.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 28767049 is about 5363.4922392039. The cubic root of 28767049 is about 306.4068271321.

The spelling of 28767049 in words is "twenty-eight million, seven hundred sixty-seven thousand, forty-nine".