28781126 has 16 divisors (see below), whose sum is σ = 47744208. Its totient is φ = 12902400.

The previous prime is 28781101. The next prime is 28781141. The reversal of 28781126 is 62118782.

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 7 ways as a sum of consecutive naturals, for example, 7355 + ... + 10566.

It is an arithmetic number, because the mean of its divisors is an integer number (2984013).

Almost surely, 2^28781126 is an apocalyptic number.

28781126 is a deficient number, since it is larger than the sum of its proper divisors (18963082).

28781126 is a wasteful number, since it uses less digits than its factorization.

28781126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18007.

The product of its digits is 10752, while the sum is 35.

The square root of 28781126 is about 5364.8043766758. The cubic root of 28781126 is about 306.4567984904.

It can be divided in two parts, 2878 and 1126, that added together give a palindrome (4004).

The spelling of 28781126 in words is "twenty-eight million, seven hundred eighty-one thousand, one hundred twenty-six".