28464819 has 8 divisors (see below), whose sum is σ = 37983120. Its totient is φ = 18961536.

The previous prime is 28464809. The next prime is 28464829. The reversal of 28464819 is 91846482.

It is an interprime number because it is at equal distance from previous prime (28464809) and next prime (28464829).

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

It is not a de Polignac number, because 28464819 - 2⁷ = 28464691 is a prime.

It is a super-3 number, since 3×28464819³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (28464809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1879 + ... + 7775.

It is an arithmetic number, because the mean of its divisors is an integer number (4747890).

Almost surely, 2^28464819 is an apocalyptic number.

28464819 is a deficient number, since it is larger than the sum of its proper divisors (9518301).

28464819 is a wasteful number, since it uses less digits than its factorization.

28464819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7509.

The product of its digits is 110592, while the sum is 42.

The square root of 28464819 is about 5335.2431059887. The cubic root of 28464819 is about 305.3299984645.

The spelling of 28464819 in words is "twenty-eight million, four hundred sixty-four thousand, eight hundred nineteen".