28464387 has 8 divisors (see below), whose sum is σ = 43374336. Its totient is φ = 16265352.

The previous prime is 28464377. The next prime is 28464419. The reversal of 28464387 is 78346482.

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

It is not a de Polignac number, because 28464387 - 2⁷ = 28464259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28464367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677703 + ... + 677744.

It is an arithmetic number, because the mean of its divisors is an integer number (5421792).

Almost surely, 2^28464387 is an apocalyptic number.

28464387 is a deficient number, since it is larger than the sum of its proper divisors (14909949).

28464387 is a wasteful number, since it uses less digits than its factorization.

28464387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355457.

The product of its digits is 258048, while the sum is 42.

The square root of 28464387 is about 5335.2026203322. The cubic root of 28464387 is about 305.3284538300.

The spelling of 28464387 in words is "twenty-eight million, four hundred sixty-four thousand, three hundred eighty-seven".