28427765 has 8 divisors (see below), whose sum is σ = 34622880. Its totient is φ = 22402512.

The previous prime is 28427759. The next prime is 28427771. The reversal of 28427765 is 56772482.

It is an interprime number because it is at equal distance from previous prime (28427759) and next prime (28427771).

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

It is a cyclic number.

It is not a de Polignac number, because 28427765 - 2¹² = 28423669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42095 + ... + 42764.

It is an arithmetic number, because the mean of its divisors is an integer number (4327860).

Almost surely, 2^28427765 is an apocalyptic number.

It is an amenable number.

28427765 is a deficient number, since it is larger than the sum of its proper divisors (6195115).

28427765 is an equidigital number, since it uses as much as digits as its factorization.

28427765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84931.

The product of its digits is 188160, while the sum is 41.

The square root of 28427765 is about 5331.7694061165. The cubic root of 28427765 is about 305.1974534387.

It can be divided in two parts, 28427 and 765, that added together give a palindrome (29192).

The spelling of 28427765 in words is "twenty-eight million, four hundred twenty-seven thousand, seven hundred sixty-five".