28385401 has 16 divisors (see below), whose sum is σ = 32175360. Its totient is φ = 24814080.

The previous prime is 28385387. The next prime is 28385417. The reversal of 28385401 is 10458382.

It is a cyclic number.

It is not a de Polignac number, because 28385401 - 2¹⁷ = 28254329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28385501) 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, 39120 + ... + 39838.

It is an arithmetic number, because the mean of its divisors is an integer number (2010960).

Almost surely, 2^28385401 is an apocalyptic number.

It is an amenable number.

28385401 is a deficient number, since it is larger than the sum of its proper divisors (3789959).

28385401 is a wasteful number, since it uses less digits than its factorization.

28385401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 28385401 is about 5327.7951349503. The cubic root of 28385401 is about 305.0457729386.

The spelling of 28385401 in words is "twenty-eight million, three hundred eighty-five thousand, four hundred one".