28881348 has 12 divisors (see below), whose sum is σ = 67389840. Its totient is φ = 9627112.

The previous prime is 28881323. The next prime is 28881379. The reversal of 28881348 is 84318882.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1203378 + ... + 1203401.

It is an arithmetic number, because the mean of its divisors is an integer number (5615820).

Almost surely, 2^28881348 is an apocalyptic number.

It is an amenable number.

28881348 is an abundant number, since it is smaller than the sum of its proper divisors (38508492).

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

28881348 is a wasteful number, since it uses less digits than its factorization.

28881348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406786 (or 2406784 counting only the distinct ones).

The product of its digits is 98304, while the sum is 42.

The square root of 28881348 is about 5374.1369539676. The cubic root of 28881348 is about 306.8121023043.

The spelling of 28881348 in words is "twenty-eight million, eight hundred eighty-one thousand, three hundred forty-eight".