202028401 has 4 divisors (see below), whose sum is σ = 205340404. Its totient is φ = 198716400.

The previous prime is 202028371. The next prime is 202028429. The reversal of 202028401 is 104820202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9928801 + 192099600 = 3151^2 + 13860^2 .

It is a cyclic number.

It is not a de Polignac number, because 202028401 - 2¹⁷ = 201897329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202058401) 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, 1655910 + ... + 1656031.

It is an arithmetic number, because the mean of its divisors is an integer number (51335101).

Almost surely, 2^202028401 is an apocalyptic number.

It is an amenable number.

202028401 is a deficient number, since it is larger than the sum of its proper divisors (3312003).

202028401 is an equidigital number, since it uses as much as digits as its factorization.

202028401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3312002.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 202028401 is about 14213.6695121281. The cubic root of 202028401 is about 586.7739282113.

Adding to 202028401 its reverse (104820202), we get a palindrome (306848603).

The spelling of 202028401 in words is "two hundred two million, twenty-eight thousand, four hundred one".