28733767 has 4 divisors (see below), whose sum is σ = 29220840. Its totient is φ = 28246696.

The previous prime is 28733759. The next prime is 28733797. The reversal of 28733767 is 76733782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28733767 - 2³ = 28733759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28733717) 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, 243448 + ... + 243565.

It is an arithmetic number, because the mean of its divisors is an integer number (7305210).

Almost surely, 2^28733767 is an apocalyptic number.

28733767 is a deficient number, since it is larger than the sum of its proper divisors (487073).

28733767 is an equidigital number, since it uses as much as digits as its factorization.

28733767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487072.

The product of its digits is 296352, while the sum is 43.

The square root of 28733767 is about 5360.3886985927. The cubic root of 28733767 is about 306.2886158720.

The spelling of 28733767 in words is "twenty-eight million, seven hundred thirty-three thousand, seven hundred sixty-seven".