28476321 has 16 divisors (see below), whose sum is σ = 39518208. Its totient is φ = 18219600.

The previous prime is 28476311. The next prime is 28476337. The reversal of 28476321 is 12367482.

It is not a de Polignac number, because 28476321 - 2⁹ = 28475809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28476311) 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 15 ways as a sum of consecutive naturals, for example, 10606 + ... + 13016.

It is an arithmetic number, because the mean of its divisors is an integer number (2469888).

Almost surely, 2^28476321 is an apocalyptic number.

It is an amenable number.

28476321 is a deficient number, since it is larger than the sum of its proper divisors (11041887).

28476321 is a wasteful number, since it uses less digits than its factorization.

28476321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572.

The product of its digits is 16128, while the sum is 33.

The square root of 28476321 is about 5336.3209236327. The cubic root of 28476321 is about 305.3711186127.

The spelling of 28476321 in words is "twenty-eight million, four hundred seventy-six thousand, three hundred twenty-one".