208028401 has 4 divisors (see below), whose sum is σ = 237746752. Its totient is φ = 178310052.

The previous prime is 208028389. The next prime is 208028407. The reversal of 208028401 is 104820802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104820802 = 2 ⋅52410401.

It is a cyclic number.

It is not a de Polignac number, because 208028401 - 2⁵ = 208028369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208028407) 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 3 ways as a sum of consecutive naturals, for example, 14859165 + ... + 14859178.

It is an arithmetic number, because the mean of its divisors is an integer number (59436688).

Almost surely, 2^208028401 is an apocalyptic number.

It is an amenable number.

208028401 is a deficient number, since it is larger than the sum of its proper divisors (29718351).

208028401 is an equidigital number, since it uses as much as digits as its factorization.

208028401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29718350.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 208028401 is about 14423.1896957642. The cubic root of 208028401 is about 592.5261797141.

The spelling of 208028401 in words is "two hundred eight million, twenty-eight thousand, four hundred one".