28642801 has 8 divisors (see below), whose sum is σ = 31356864. Its totient is φ = 25947120.

The previous prime is 28642799. The next prime is 28642811. The reversal of 28642801 is 10824682.

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

It is a cyclic number.

It is not a de Polignac number, because 28642801 - 2¹ = 28642799 is a prime.

It is a super-4 number, since 4×28642801⁴ (a number of 31 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (28642811) 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, 1221 + ... + 7666.

It is an arithmetic number, because the mean of its divisors is an integer number (3919608).

Almost surely, 2^28642801 is an apocalyptic number.

It is an amenable number.

28642801 is a deficient number, since it is larger than the sum of its proper divisors (2714063).

28642801 is a wasteful number, since it uses less digits than its factorization.

28642801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9191.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 28642801 is about 5351.8969534175. The cubic root of 28642801 is about 305.9650557445.

It can be divided in two parts, 2864 and 2801, that added together give a palindrome (5665).

The spelling of 28642801 in words is "twenty-eight million, six hundred forty-two thousand, eight hundred one".