28002301 has 4 divisors (see below), whose sum is σ = 28274272. Its totient is φ = 27730332.

The previous prime is 28002287. The next prime is 28002307. The reversal of 28002301 is 10320082.

It is a happy number.

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: 10320082 = 2 ⋅5160041.

It is a cyclic number.

It is not a de Polignac number, because 28002301 - 2⁹ = 28001789 is a prime.

It is a super-2 number, since 2×28002301² = 1568257722589202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28002307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135831 + ... + 136036.

It is an arithmetic number, because the mean of its divisors is an integer number (7068568).

Almost surely, 2^28002301 is an apocalyptic number.

It is an amenable number.

28002301 is a deficient number, since it is larger than the sum of its proper divisors (271971).

28002301 is a wasteful number, since it uses less digits than its factorization.

28002301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271970.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 28002301 is about 5291.7200417256. The cubic root of 28002301 is about 303.6672150445.

Adding to 28002301 its reverse (10320082), we get a palindrome (38322383).

The spelling of 28002301 in words is "twenty-eight million, two thousand, three hundred one".