28550992 has 20 divisors (see below), whose sum is σ = 55486900. Its totient is φ = 14231808.

The previous prime is 28550987. The next prime is 28551001. The reversal of 28550992 is 29905582.

It can be written as a sum of positive squares in 2 ways, for example, as 8156736 + 20394256 = 2856^2 + 4516^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3028 + ... + 8140.

It is an arithmetic number, because the mean of its divisors is an integer number (2774345).

Almost surely, 2^28550992 is an apocalyptic number.

It is an amenable number.

28550992 is a deficient number, since it is larger than the sum of its proper divisors (26935908).

28550992 is a wasteful number, since it uses less digits than its factorization.

28550992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470 (or 5464 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 28550992 is about 5343.3128300709. The cubic root of 28550992 is about 305.6378017619.

The spelling of 28550992 in words is "twenty-eight million, five hundred fifty thousand, nine hundred ninety-two".