28489215 has 8 divisors (see below), whose sum is σ = 45582768. Its totient is φ = 15194240.

The previous prime is 28489211. The next prime is 28489231. The reversal of 28489215 is 51298482.

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

It is not a de Polignac number, because 28489215 - 2² = 28489211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28489211) 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, 949626 + ... + 949655.

It is an arithmetic number, because the mean of its divisors is an integer number (5697846).

Almost surely, 2^28489215 is an apocalyptic number.

28489215 is a deficient number, since it is larger than the sum of its proper divisors (17093553).

28489215 is a wasteful number, since it uses less digits than its factorization.

28489215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899289.

The product of its digits is 46080, while the sum is 39.

The square root of 28489215 is about 5337.5289226383. The cubic root of 28489215 is about 305.4172020594.

The spelling of 28489215 in words is "twenty-eight million, four hundred eighty-nine thousand, two hundred fifteen".