28664037 has 12 divisors (see below), whose sum is σ = 42937440. Its totient is φ = 19109196.

The previous prime is 28663939. The next prime is 28664071. The reversal of 28664037 is 73046682.

28664037 is a `hidden beast` number, since 2 + 8 + 6 + 640 + 3 + 7 = 666.

It is not a de Polignac number, because 28664037 - 2²² = 24469733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28663992 and 28664010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28664087) 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 11 ways as a sum of consecutive naturals, for example, 58737 + ... + 59222.

It is an arithmetic number, because the mean of its divisors is an integer number (3578120).

Almost surely, 2^28664037 is an apocalyptic number.

28664037 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28664037 is a deficient number, since it is larger than the sum of its proper divisors (14273403).

28664037 is an equidigital number, since it uses as much as digits as its factorization.

28664037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117974 (or 117962 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 28664037 is about 5353.8805552608. The cubic root of 28664037 is about 306.0406520386.

It can be divided in two parts, 2866 and 4037, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 28664037 in words is "twenty-eight million, six hundred sixty-four thousand, thirty-seven".