28454502 has 8 divisors (see below), whose sum is σ = 56909016. Its totient is φ = 9484832.

The previous prime is 28454501. The next prime is 28454507. The reversal of 28454502 is 20545482.

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

28454502 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 28454502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28454501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2371203 + ... + 2371214.

It is an arithmetic number, because the mean of its divisors is an integer number (7113627).

Almost surely, 2^28454502 is an apocalyptic number.

28454502 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28454502 is a wasteful number, since it uses less digits than its factorization.

28454502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4742422.

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 28454502 is about 5334.2761458327. The cubic root of 28454502 is about 305.2931053176.

Adding to 28454502 its reverse (20545482), we get a palindrome (48999984).

The spelling of 28454502 in words is "twenty-eight million, four hundred fifty-four thousand, five hundred two".