28464619 has 4 divisors (see below), whose sum is σ = 29158920. Its totient is φ = 27770320.

The previous prime is 28464617. The next prime is 28464629. The reversal of 28464619 is 91646482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28464619 - 2¹ = 28464617 is a prime.

It is a super-2 number, since 2×28464619² = 1620469069630322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28464617) 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, 347089 + ... + 347170.

It is an arithmetic number, because the mean of its divisors is an integer number (7289730).

Almost surely, 2^28464619 is an apocalyptic number.

28464619 is a deficient number, since it is larger than the sum of its proper divisors (694301).

28464619 is an equidigital number, since it uses as much as digits as its factorization.

28464619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694300.

The product of its digits is 82944, while the sum is 40.

The square root of 28464619 is about 5335.2243626674. The cubic root of 28464619 is about 305.3292833579.

The spelling of 28464619 in words is "twenty-eight million, four hundred sixty-four thousand, six hundred nineteen".