28348884 has 18 divisors (see below), whose sum is σ = 71659770. Its totient is φ = 9449616.

The previous prime is 28348883. The next prime is 28348897. The reversal of 28348884 is 48884382.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22297284 + 6051600 = 4722^2 + 2460^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28348883) 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 5 ways as a sum of consecutive naturals, for example, 393699 + ... + 393770.

Almost surely, 2^28348884 is an apocalyptic number.

It is an amenable number.

28348884 is an abundant number, since it is smaller than the sum of its proper divisors (43310886).

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

28348884 is a wasteful number, since it uses less digits than its factorization.

28348884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787479 (or 787474 counting only the distinct ones).

The product of its digits is 393216, while the sum is 45.

The square root of 28348884 is about 5324.3670046307. The cubic root of 28348884 is about 304.9149059396.

The spelling of 28348884 in words is "twenty-eight million, three hundred forty-eight thousand, eight hundred eighty-four".