28311536 has 20 divisors (see below), whose sum is σ = 59840664. Its totient is φ = 12868800.

The previous prime is 28311533. The next prime is 28311541. The reversal of 28311536 is 63511382.

It is a junction number, because it is equal to n+sod(n) for n = 28311499 and 28311508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28311533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80255 + ... + 80606.

Almost surely, 2^28311536 is an apocalyptic number.

It is an amenable number.

28311536 is an abundant number, since it is smaller than the sum of its proper divisors (31529128).

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

28311536 is a wasteful number, since it uses less digits than its factorization.

28311536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160880 (or 160874 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 28311536 is about 5320.8585773351. The cubic root of 28311536 is about 304.7809445632.

The spelling of 28311536 in words is "twenty-eight million, three hundred eleven thousand, five hundred thirty-six".