28489316 has 12 divisors (see below), whose sum is σ = 49967232. Its totient is φ = 14212968.

The previous prime is 28489313. The next prime is 28489319. The reversal of 28489316 is 61398482.

It is an interprime number because it is at equal distance from previous prime (28489313) and next prime (28489319).

It is a super-2 number, since 2×28489316² = 1623282252295712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28489313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5840 + ... + 9543.

It is an arithmetic number, because the mean of its divisors is an integer number (4163936).

Almost surely, 2^28489316 is an apocalyptic number.

It is an amenable number.

28489316 is a deficient number, since it is larger than the sum of its proper divisors (21477916).

28489316 is a wasteful number, since it uses less digits than its factorization.

28489316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15850 (or 15848 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 28489316 is about 5337.5383839369. The cubic root of 28489316 is about 305.4175629808.

The spelling of 28489316 in words is "twenty-eight million, four hundred eighty-nine thousand, three hundred sixteen".