28324551 has 8 divisors (see below), whose sum is σ = 37824880. Its totient is φ = 18853632.

The previous prime is 28324547. The next prime is 28324553. The reversal of 28324551 is 15542382.

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

It is not a de Polignac number, because 28324551 - 2² = 28324547 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 (28324553) 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, 4996 + ... + 9033.

It is an arithmetic number, because the mean of its divisors is an integer number (4728110).

Almost surely, 2^28324551 is an apocalyptic number.

28324551 is a deficient number, since it is larger than the sum of its proper divisors (9500329).

28324551 is a wasteful number, since it uses less digits than its factorization.

28324551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14705.

The product of its digits is 9600, while the sum is 30.

The square root of 28324551 is about 5322.0814537171. The cubic root of 28324551 is about 304.8276406792.

The spelling of 28324551 in words is "twenty-eight million, three hundred twenty-four thousand, five hundred fifty-one".