28302385 has 8 divisors (see below), whose sum is σ = 34752960. Its totient is φ = 22115184.

The previous prime is 28302367. The next prime is 28302389. The reversal of 28302385 is 58320382.

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 28302385 - 2⁷ = 28302257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28302389) 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, 65605 + ... + 66034.

It is an arithmetic number, because the mean of its divisors is an integer number (4344120).

Almost surely, 2^28302385 is an apocalyptic number.

It is an amenable number.

28302385 is a deficient number, since it is larger than the sum of its proper divisors (6450575).

28302385 is a wasteful number, since it uses less digits than its factorization.

28302385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131687.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 28302385 is about 5319.9985902254. The cubic root of 28302385 is about 304.7481034041.

The spelling of 28302385 in words is "twenty-eight million, three hundred two thousand, three hundred eighty-five".