28273790 has 32 divisors (see below), whose sum is σ = 53222400. Its totient is φ = 10803744.

The previous prime is 28273769. The next prime is 28273841. The reversal of 28273790 is 9737282.

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 15 ways as a sum of consecutive naturals, for example, 19511 + ... + 20909.

It is an arithmetic number, because the mean of its divisors is an integer number (1663200).

Almost surely, 2^28273790 is an apocalyptic number.

28273790 is a deficient number, since it is larger than the sum of its proper divisors (24948610).

28273790 is a wasteful number, since it uses less digits than its factorization.

28273790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 28273790 is about 5317.3104103484. The cubic root of 28273790 is about 304.6454358674.

The spelling of 28273790 in words is "twenty-eight million, two hundred seventy-three thousand, seven hundred ninety".