28456019 has 8 divisors (see below), whose sum is σ = 28952928. Its totient is φ = 27961920.

The previous prime is 28456007. The next prime is 28456063. The reversal of 28456019 is 91065482.

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

It is a cyclic number.

It is not a de Polignac number, because 28456019 - 2¹² = 28451923 is a prime.

It is a super-2 number, since 2×28456019² = 1619490034656722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28456019.

It is not an unprimeable number, because it can be changed into a prime (28456619) 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, 32009 + ... + 32885.

It is an arithmetic number, because the mean of its divisors is an integer number (3619116).

Almost surely, 2^28456019 is an apocalyptic number.

28456019 is a deficient number, since it is larger than the sum of its proper divisors (496909).

28456019 is an equidigital number, since it uses as much as digits as its factorization.

28456019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 28456019 is about 5334.4183375510. The cubic root of 28456019 is about 305.2985306033.

The spelling of 28456019 in words is "twenty-eight million, four hundred fifty-six thousand, nineteen".