28219218 has 32 divisors (see below), whose sum is σ = 62907840. Its totient is φ = 8386560.

The previous prime is 28219211. The next prime is 28219277. The reversal of 28219218 is 81291282.

It is not an unprimeable number, because it can be changed into a prime (28219211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5343 + ... + 9218.

It is an arithmetic number, because the mean of its divisors is an integer number (1965870).

Almost surely, 2^28219218 is an apocalyptic number.

28219218 is an abundant number, since it is smaller than the sum of its proper divisors (34688622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28219218 is a wasteful number, since it uses less digits than its factorization.

28219218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14602.

The product of its digits is 4608, while the sum is 33.

The square root of 28219218 is about 5312.1763901437. The cubic root of 28219218 is about 304.4493081887.

The spelling of 28219218 in words is "twenty-eight million, two hundred nineteen thousand, two hundred eighteen".