28229936 has 40 divisors (see below), whose sum is σ = 62808480. Its totient is φ = 12040704.

The previous prime is 28229923. The next prime is 28229969. The reversal of 28229936 is 63992282.

It is a junction number, because it is equal to n+sod(n) for n = 28229893 and 28229902.

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 in 7 ways as a sum of consecutive naturals, for example, 29660 + ... + 30596.

It is an arithmetic number, because the mean of its divisors is an integer number (1570212).

Almost surely, 2^28229936 is an apocalyptic number.

It is an amenable number.

28229936 is an abundant number, since it is smaller than the sum of its proper divisors (34578544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28229936 is a wasteful number, since it uses less digits than its factorization.

28229936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221 (or 1215 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 28229936 is about 5313.1851087648. The cubic root of 28229936 is about 304.4878478186.

The spelling of 28229936 in words is "twenty-eight million, two hundred twenty-nine thousand, nine hundred thirty-six".