28144308 has 24 divisors (see below), whose sum is σ = 65914912. Its totient is φ = 9346464.

The previous prime is 28144289. The next prime is 28144331. The reversal of 28144308 is 80344182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 910 + ... + 7557.

Almost surely, 2^28144308 is an apocalyptic number.

It is an amenable number.

28144308 is an abundant number, since it is smaller than the sum of its proper divisors (37770604).

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

28144308 is a wasteful number, since it uses less digits than its factorization.

28144308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8751 (or 8749 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 28144308 is about 5305.1209222788. The cubic root of 28144308 is about 304.1796750634.

The spelling of 28144308 in words is "twenty-eight million, one hundred forty-four thousand, three hundred eight".