28002801 has 8 divisors (see below), whose sum is σ = 37606240. Its totient is φ = 18533952.

The previous prime is 28002797. The next prime is 28002803. The reversal of 28002801 is 10820082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28002801 - 2² = 28002797 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28002803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33160 + ... + 33993.

It is an arithmetic number, because the mean of its divisors is an integer number (4700780).

Almost surely, 2^28002801 is an apocalyptic number.

It is an amenable number.

28002801 is a deficient number, since it is larger than the sum of its proper divisors (9603439).

28002801 is a wasteful number, since it uses less digits than its factorization.

28002801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67295.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 28002801 is about 5291.7672851326. The cubic root of 28002801 is about 303.6690224282.

Adding to 28002801 its reverse (10820082), we get a palindrome (38822883).

The spelling of 28002801 in words is "twenty-eight million, two thousand, eight hundred one".