28771744 has 24 divisors (see below), whose sum is σ = 56972160. Its totient is φ = 14302656.

The previous prime is 28771727. The next prime is 28771747. The reversal of 28771744 is 44717782.

It is a junction number, because it is equal to n+sod(n) for n = 28771697 and 28771706.

It is not an unprimeable number, because it can be changed into a prime (28771747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3217 + ... + 8239.

It is an arithmetic number, because the mean of its divisors is an integer number (2373840).

Almost surely, 2^28771744 is an apocalyptic number.

It is an amenable number.

28771744 is a deficient number, since it is larger than the sum of its proper divisors (28200416).

28771744 is a wasteful number, since it uses less digits than its factorization.

28771744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5212 (or 5204 counting only the distinct ones).

The product of its digits is 87808, while the sum is 40.

The square root of 28771744 is about 5363.9299025994. The cubic root of 28771744 is about 306.4234955293.

The spelling of 28771744 in words is "twenty-eight million, seven hundred seventy-one thousand, seven hundred forty-four".