28212601 has 8 divisors (see below), whose sum is σ = 28962560. Its totient is φ = 27466992.

The previous prime is 28212557. The next prime is 28212617. The reversal of 28212601 is 10621282.

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 28212601 - 2¹³ = 28204409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28212661) 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 7 ways as a sum of consecutive naturals, for example, 15160 + ... + 16918.

It is an arithmetic number, because the mean of its divisors is an integer number (3620320).

Almost surely, 2^28212601 is an apocalyptic number.

It is an amenable number.

28212601 is a deficient number, since it is larger than the sum of its proper divisors (749959).

28212601 is a wasteful number, since it uses less digits than its factorization.

28212601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 28212601 is about 5311.5535392200. The cubic root of 28212601 is about 304.4255100032.

Adding to 28212601 its reverse (10621282), we get a palindrome (38833883).

The spelling of 28212601 in words is "twenty-eight million, two hundred twelve thousand, six hundred one".