28219478 has 8 divisors (see below), whose sum is σ = 48376272. Its totient is φ = 12094056.

The previous prime is 28219463. The next prime is 28219487. The reversal of 28219478 is 87491282.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1007825 + ... + 1007852.

It is an arithmetic number, because the mean of its divisors is an integer number (6047034).

Almost surely, 2^28219478 is an apocalyptic number.

28219478 is a deficient number, since it is larger than the sum of its proper divisors (20156794).

28219478 is a wasteful number, since it uses less digits than its factorization.

28219478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015686.

The product of its digits is 64512, while the sum is 41.

The square root of 28219478 is about 5312.2008621663. The cubic root of 28219478 is about 304.4502432084.

The spelling of 28219478 in words is "twenty-eight million, two hundred nineteen thousand, four hundred seventy-eight".