28816401 has 16 divisors (see below), whose sum is σ = 41477760. Its totient is φ = 17740800.

The previous prime is 28816397. The next prime is 28816409. The reversal of 28816401 is 10461882.

It is not a de Polignac number, because 28816401 - 2² = 28816397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28816409) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 5200 + ... + 9201.

It is an arithmetic number, because the mean of its divisors is an integer number (2592360).

Almost surely, 2^28816401 is an apocalyptic number.

It is an amenable number.

28816401 is a deficient number, since it is larger than the sum of its proper divisors (12661359).

28816401 is a wasteful number, since it uses less digits than its factorization.

28816401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14456.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28816401 is about 5368.0910014641. The cubic root of 28816401 is about 306.5819482165.

The spelling of 28816401 in words is "twenty-eight million, eight hundred sixteen thousand, four hundred one".