28520767 has 8 divisors (see below), whose sum is σ = 32751360. Its totient is φ = 24563160.

The previous prime is 28520711. The next prime is 28520773. The reversal of 28520767 is 76702582.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28520767 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 (28520267) 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, 68023 + ... + 68440.

It is an arithmetic number, because the mean of its divisors is an integer number (4093920).

Almost surely, 2^28520767 is an apocalyptic number.

28520767 is a deficient number, since it is larger than the sum of its proper divisors (4230593).

28520767 is a wasteful number, since it uses less digits than its factorization.

28520767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136493.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 28520767 is about 5340.4837795840. The cubic root of 28520767 is about 305.5299110060.

The spelling of 28520767 in words is "twenty-eight million, five hundred twenty thousand, seven hundred sixty-seven".