28209464 has 8 divisors (see below), whose sum is σ = 52892760. Its totient is φ = 14104728.

The previous prime is 28209451. The next prime is 28209487. The reversal of 28209464 is 46490282.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1763084 + ... + 1763099.

It is an arithmetic number, because the mean of its divisors is an integer number (6611595).

Almost surely, 2^28209464 is an apocalyptic number.

It is an amenable number.

28209464 is a deficient number, since it is larger than the sum of its proper divisors (24683296).

28209464 is a wasteful number, since it uses less digits than its factorization.

28209464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3526189 (or 3526185 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 28209464 is about 5311.2582313422. The cubic root of 28209464 is about 304.4142264137.

The spelling of 28209464 in words is "twenty-eight million, two hundred nine thousand, four hundred sixty-four".