28331018 has 8 divisors (see below), whose sum is σ = 42523140. Its totient is φ = 14156640.

The previous prime is 28331003. The next prime is 28331029. The reversal of 28331018 is 81013382.

It can be written as a sum of positive squares in 2 ways, for example, as 27384289 + 946729 = 5233^2 + 973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788 + ... + 7568.

Almost surely, 2^28331018 is an apocalyptic number.

28331018 is a deficient number, since it is larger than the sum of its proper divisors (14192122).

28331018 is a wasteful number, since it uses less digits than its factorization.

28331018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8872.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 28331018 is about 5322.6889820841. The cubic root of 28331018 is about 304.8508381089.

The spelling of 28331018 in words is "twenty-eight million, three hundred thirty-one thousand, eighteen".