28161776 has 20 divisors (see below), whose sum is σ = 54646800. Its totient is φ = 14059392.

The previous prime is 28161769. The next prime is 28161779. The reversal of 28161776 is 67716182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28161779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17285 + ... + 18843.

It is an arithmetic number, because the mean of its divisors is an integer number (2732340).

Almost surely, 2^28161776 is an apocalyptic number.

It is an amenable number.

28161776 is a deficient number, since it is larger than the sum of its proper divisors (26485024).

28161776 is a wasteful number, since it uses less digits than its factorization.

28161776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696 (or 2690 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 28161776 is about 5306.7670007265. The cubic root of 28161776 is about 304.2425926011.

The spelling of 28161776 in words is "twenty-eight million, one hundred sixty-one thousand, seven hundred seventy-six".