28490368 has 32 divisors (see below), whose sum is σ = 60101460. Its totient is φ = 13406208.

The previous prime is 28490347. The next prime is 28490369. The reversal of 28490368 is 86309482.

It can be written as a sum of positive squares in 2 ways, for example, as 24522304 + 3968064 = 4952^2 + 1992^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 28490368.

It is not an unprimeable number, because it can be changed into a prime (28490369) 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 3 ways as a sum of consecutive naturals, for example, 4371 + ... + 8722.

Almost surely, 2^28490368 is an apocalyptic number.

It is an amenable number.

28490368 is an abundant number, since it is smaller than the sum of its proper divisors (31611092).

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

28490368 is a wasteful number, since it uses less digits than its factorization.

28490368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13124 (or 13112 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 28490368 is about 5337.6369303279. The cubic root of 28490368 is about 305.4213222300.

The spelling of 28490368 in words is "twenty-eight million, four hundred ninety thousand, three hundred sixty-eight".