28950388 has 24 divisors (see below), whose sum is σ = 53875584. Its totient is φ = 13564800.

The previous prime is 28950379. The next prime is 28950421. The reversal of 28950388 is 88305982.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17643 + ... + 19213.

It is an arithmetic number, because the mean of its divisors is an integer number (2244816).

Almost surely, 2^28950388 is an apocalyptic number.

It is an amenable number.

28950388 is a deficient number, since it is larger than the sum of its proper divisors (24925196).

28950388 is a wasteful number, since it uses less digits than its factorization.

28950388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863 (or 1861 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 28950388 is about 5380.5564767968. The cubic root of 28950388 is about 307.0563828155.

The spelling of 28950388 in words is "twenty-eight million, nine hundred fifty thousand, three hundred eighty-eight".