28161748 has 24 divisors (see below), whose sum is σ = 50420384. Its totient is φ = 13759200.

The previous prime is 28161701. The next prime is 28161767. The reversal of 28161748 is 84716182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51211 + ... + 51757.

Almost surely, 2^28161748 is an apocalyptic number.

It is an amenable number.

28161748 is a deficient number, since it is larger than the sum of its proper divisors (22258636).

28161748 is a wasteful number, since it uses less digits than its factorization.

28161748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 821 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 28161748 is about 5306.7643625848. The cubic root of 28161748 is about 304.2424917694.

It can be divided in two parts, 2816174 and 8, that added together give a palindrome (2816182).

The spelling of 28161748 in words is "twenty-eight million, one hundred sixty-one thousand, seven hundred forty-eight".