28669938 has 32 divisors (see below), whose sum is σ = 62786880. Its totient is φ = 8655360.

The previous prime is 28669919. The next prime is 28669967. The reversal of 28669938 is 83996682.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21598 + ... + 22886.

It is an arithmetic number, because the mean of its divisors is an integer number (1962090).

Almost surely, 2^28669938 is an apocalyptic number.

28669938 is an abundant number, since it is smaller than the sum of its proper divisors (34116942).

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

28669938 is a wasteful number, since it uses less digits than its factorization.

28669938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642.

The product of its digits is 1119744, while the sum is 51.

The square root of 28669938 is about 5354.4316224974. The cubic root of 28669938 is about 306.0616518949.

It can be divided in two parts, 28 and 669938, that added together give a palindrome (669966).

The spelling of 28669938 in words is "twenty-eight million, six hundred sixty-nine thousand, nine hundred thirty-eight".