28503668 has 12 divisors (see below), whose sum is σ = 51041760. Its totient is φ = 13920312.

The previous prime is 28503661. The next prime is 28503697. The reversal of 28503668 is 86630582.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28503661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82688 + ... + 83031.

It is an arithmetic number, because the mean of its divisors is an integer number (4253480).

Almost surely, 2^28503668 is an apocalyptic number.

It is an amenable number.

28503668 is a deficient number, since it is larger than the sum of its proper divisors (22538092).

28503668 is a wasteful number, since it uses less digits than its factorization.

28503668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165766 (or 165764 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 28503668 is about 5338.8826546385. The cubic root of 28503668 is about 305.4688408821.

The spelling of 28503668 in words is "twenty-eight million, five hundred three thousand, six hundred sixty-eight".