28230616 has 8 divisors (see below), whose sum is σ = 52932420. Its totient is φ = 14115304.

The previous prime is 28230613. The next prime is 28230619. The reversal of 28230616 is 61603282.

It is an interprime number because it is at equal distance from previous prime (28230613) and next prime (28230619).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28230613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1764406 + ... + 1764421.

Almost surely, 2^28230616 is an apocalyptic number.

It is an amenable number.

28230616 is a deficient number, since it is larger than the sum of its proper divisors (24701804).

28230616 is a wasteful number, since it uses less digits than its factorization.

28230616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3528833 (or 3528829 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 28230616 is about 5313.2491001270. The cubic root of 28230616 is about 304.4902926237.

Adding to 28230616 its reverse (61603282), we get a palindrome (89833898).

The spelling of 28230616 in words is "twenty-eight million, two hundred thirty thousand, six hundred sixteen".