28213546 has 8 divisors (see below), whose sum is σ = 42716160. Its totient is φ = 13974828.

The previous prime is 28213541. The next prime is 28213553. The reversal of 28213546 is 64531282.

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

It is not an unprimeable number, because it can be changed into a prime (28213541) by changing a digit.

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, 65706 + ... + 66133.

It is an arithmetic number, because the mean of its divisors is an integer number (5339520).

Almost surely, 2^28213546 is an apocalyptic number.

28213546 is a deficient number, since it is larger than the sum of its proper divisors (14502614).

28213546 is a wasteful number, since it uses less digits than its factorization.

28213546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131948.

The product of its digits is 11520, while the sum is 31.

The square root of 28213546 is about 5311.6424954999. The cubic root of 28213546 is about 304.4289089442.

The spelling of 28213546 in words is "twenty-eight million, two hundred thirteen thousand, five hundred forty-six".