28213418 has 8 divisors (see below), whose sum is σ = 43304448. Its totient is φ = 13778604.

The previous prime is 28213403. The next prime is 28213459. The reversal of 28213418 is 81431282.

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

It is a super-4 number, since 4×28213418⁴ (a number of 31 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163946 + ... + 164117.

It is an arithmetic number, because the mean of its divisors is an integer number (5413056).

Almost surely, 2^28213418 is an apocalyptic number.

28213418 is a deficient number, since it is larger than the sum of its proper divisors (15091030).

28213418 is a wasteful number, since it uses less digits than its factorization.

28213418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328108.

The product of its digits is 3072, while the sum is 29.

The square root of 28213418 is about 5311.6304464825. The cubic root of 28213418 is about 304.4284485629.

The spelling of 28213418 in words is "twenty-eight million, two hundred thirteen thousand, four hundred eighteen".