28989646 has 16 divisors (see below), whose sum is σ = 49880160. Its totient is φ = 12378240.

The previous prime is 28989643. The next prime is 28989661. The reversal of 28989646 is 64698982.

It is a junction number, because it is equal to n+sod(n) for n = 28989593 and 28989602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28989643) 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, 250 + ... + 7618.

It is an arithmetic number, because the mean of its divisors is an integer number (3117510).

Almost surely, 2^28989646 is an apocalyptic number.

28989646 is a deficient number, since it is larger than the sum of its proper divisors (20890514).

28989646 is a wasteful number, since it uses less digits than its factorization.

28989646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7659.

The product of its digits is 1492992, while the sum is 52.

The square root of 28989646 is about 5384.2033765451. The cubic root of 28989646 is about 307.1951141145.

It can be divided in two parts, 2898 and 9646, that added together give a square (12544 = 112²).

The spelling of 28989646 in words is "twenty-eight million, nine hundred eighty-nine thousand, six hundred forty-six".