28219466 has 8 divisors (see below), whose sum is σ = 46177344. Its totient is φ = 12827020.

The previous prime is 28219463. The next prime is 28219487. The reversal of 28219466 is 66491282.

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

It is a super-2 number, since 2×28219466² = 1592676522650312, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28219463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641330 + ... + 641373.

It is an arithmetic number, because the mean of its divisors is an integer number (5772168).

Almost surely, 2^28219466 is an apocalyptic number.

28219466 is a deficient number, since it is larger than the sum of its proper divisors (17957878).

28219466 is a wasteful number, since it uses less digits than its factorization.

28219466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282716.

The product of its digits is 41472, while the sum is 38.

The square root of 28219466 is about 5312.1997326908. The cubic root of 28219466 is about 304.4502000538.

The spelling of 28219466 in words is "twenty-eight million, two hundred nineteen thousand, four hundred sixty-six".