28520318 has 8 divisors (see below), whose sum is σ = 42947712. Its totient is φ = 14204416.

The previous prime is 28520293. The next prime is 28520321. The reversal of 28520318 is 81302582.

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

It is a super-2 number, since 2×28520318² = 1626817077642248, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 27230 + ... + 28257.

It is an arithmetic number, because the mean of its divisors is an integer number (5368464).

Almost surely, 2^28520318 is an apocalyptic number.

28520318 is a deficient number, since it is larger than the sum of its proper divisors (14427394).

28520318 is a wasteful number, since it uses less digits than its factorization.

28520318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55746.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 28520318 is about 5340.4417420285. The cubic root of 28520318 is about 305.5283076872.

The spelling of 28520318 in words is "twenty-eight million, five hundred twenty thousand, three hundred eighteen".