28322501 has 8 divisors (see below), whose sum is σ = 29302560. Its totient is φ = 27353808.

The previous prime is 28322479. The next prime is 28322507. The reversal of 28322501 is 10522382.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28322501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28322507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2390 + ... + 7896.

It is an arithmetic number, because the mean of its divisors is an integer number (3662820).

Almost surely, 2^28322501 is an apocalyptic number.

It is an amenable number.

28322501 is a deficient number, since it is larger than the sum of its proper divisors (980059).

28322501 is a wasteful number, since it uses less digits than its factorization.

28322501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5683.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 28322501 is about 5321.8888564118. Note that the first 4 decimals coincide. The cubic root of 28322501 is about 304.8202864968.

Adding to 28322501 its reverse (10522382), we get a palindrome (38844883).

The spelling of 28322501 in words is "twenty-eight million, three hundred twenty-two thousand, five hundred one".