28645516 has 6 divisors (see below), whose sum is σ = 50129660. Its totient is φ = 14322756.

The previous prime is 28645499. The next prime is 28645517. The reversal of 28645516 is 61554682.

It is not an unprimeable number, because it can be changed into a prime (28645517) 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 as a sum of consecutive naturals, namely, 3580686 + ... + 3580693.

Almost surely, 2^28645516 is an apocalyptic number.

It is an amenable number.

28645516 is a deficient number, since it is larger than the sum of its proper divisors (21484144).

28645516 is a wasteful number, since it uses less digits than its factorization.

28645516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7161383 (or 7161381 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 28645516 is about 5352.1505957886. The cubic root of 28645516 is about 305.9747227330.

It can be divided in two parts, 28645 and 516, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 28645516 in words is "twenty-eight million, six hundred forty-five thousand, five hundred sixteen".