28386648 has 24 divisors (see below), whose sum is σ = 76880700. Its totient is φ = 9462192.

The previous prime is 28386647. The next prime is 28386649. The reversal of 28386648 is 84668382.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28386647) and next prime (28386649).

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28386643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197058 + ... + 197201.

Almost surely, 2^28386648 is an apocalyptic number.

It is an amenable number.

28386648 is an abundant number, since it is smaller than the sum of its proper divisors (48494052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28386648 is a wasteful number, since it uses less digits than its factorization.

28386648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394271 (or 394264 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 28386648 is about 5327.9121614381. The cubic root of 28386648 is about 305.0502398652.

The spelling of 28386648 in words is "twenty-eight million, three hundred eighty-six thousand, six hundred forty-eight".