28299455 has 8 divisors (see below), whose sum is σ = 35746800. Its totient is φ = 21447936.

The previous prime is 28299451. The next prime is 28299457. The reversal of 28299455 is 55499282.

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 28299455 - 2² = 28299451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28299451) 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, 148850 + ... + 149039.

It is an arithmetic number, because the mean of its divisors is an integer number (4468350).

Almost surely, 2^28299455 is an apocalyptic number.

28299455 is a deficient number, since it is larger than the sum of its proper divisors (7447345).

28299455 is a wasteful number, since it uses less digits than its factorization.

28299455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297913.

The product of its digits is 259200, while the sum is 44.

The square root of 28299455 is about 5319.7232070851. The cubic root of 28299455 is about 304.7375867079.

The spelling of 28299455 in words is "twenty-eight million, two hundred ninety-nine thousand, four hundred fifty-five".