28618532 has 24 divisors (see below), whose sum is σ = 52495296. Its totient is φ = 13625568.

The previous prime is 28618523. The next prime is 28618537. The reversal of 28618532 is 23581682.

It is a junction number, because it is equal to n+sod(n) for n = 28618492 and 28618501.

It is not an unprimeable number, because it can be changed into a prime (28618537) 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 7 ways as a sum of consecutive naturals, for example, 24923 + ... + 26045.

It is an arithmetic number, because the mean of its divisors is an integer number (2187304).

Almost surely, 2^28618532 is an apocalyptic number.

It is an amenable number.

28618532 is a deficient number, since it is larger than the sum of its proper divisors (23876764).

28618532 is a wasteful number, since it uses less digits than its factorization.

28618532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427 (or 1425 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 28618532 is about 5349.6291460250. The cubic root of 28618532 is about 305.8786167574.

The spelling of 28618532 in words is "twenty-eight million, six hundred eighteen thousand, five hundred thirty-two".