28928836 has 6 divisors (see below), whose sum is σ = 50625470. Its totient is φ = 14464416.

The previous prime is 28928833. The next prime is 28928843. The reversal of 28928836 is 63882982.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28196100 + 732736 = 5310^2 + 856^2 .

It is not an unprimeable number, because it can be changed into a prime (28928833) 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 as a sum of consecutive naturals, namely, 3616101 + ... + 3616108.

Almost surely, 2^28928836 is an apocalyptic number.

It is an amenable number.

28928836 is a deficient number, since it is larger than the sum of its proper divisors (21696634).

28928836 is a wasteful number, since it uses less digits than its factorization.

28928836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7232213 (or 7232211 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 28928836 is about 5378.5533370973. The cubic root of 28928836 is about 306.9801682698.

The spelling of 28928836 in words is "twenty-eight million, nine hundred twenty-eight thousand, eight hundred thirty-six".