28642036 has 12 divisors (see below), whose sum is σ = 50164128. Its totient is φ = 14309432.

The previous prime is 28642021. The next prime is 28642037. The reversal of 28642036 is 63024682.

It is a junction number, because it is equal to n+sod(n) for n = 28641989 and 28642007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28642037) 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 3 ways as a sum of consecutive naturals, for example, 5145 + ... + 9151.

It is an arithmetic number, because the mean of its divisors is an integer number (4180344).

Almost surely, 2^28642036 is an apocalyptic number.

It is an amenable number.

28642036 is a deficient number, since it is larger than the sum of its proper divisors (21522092).

28642036 is a wasteful number, since it uses less digits than its factorization.

28642036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5798 (or 5796 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 28642036 is about 5351.8254829544. The cubic root of 28642036 is about 305.9623317866.

It can be divided in two parts, 2864 and 2036, that added together give a square (4900 = 70²).

The spelling of 28642036 in words is "twenty-eight million, six hundred forty-two thousand, thirty-six".