28847636 has 6 divisors (see below), whose sum is σ = 50483370. Its totient is φ = 14423816.

The previous prime is 28847627. The next prime is 28847677. The reversal of 28847636 is 63674882.

It can be written as a sum of positive squares in only one way, i.e., 21252100 + 7595536 = 4610^2 + 2756^2 .

It is a super-2 number, since 2×28847636² = 1664372205576992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 3605951 + ... + 3605958.

It is an arithmetic number, because the mean of its divisors is an integer number (8413895).

Almost surely, 2^28847636 is an apocalyptic number.

It is an amenable number.

28847636 is a deficient number, since it is larger than the sum of its proper divisors (21635734).

28847636 is a wasteful number, since it uses less digits than its factorization.

28847636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7211913 (or 7211911 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 28847636 is about 5370.9995345373. Note that the first 3 decimals coincide. The cubic root of 28847636 is about 306.6926794779.

The spelling of 28847636 in words is "twenty-eight million, eight hundred forty-seven thousand, six hundred thirty-six".