28816772 has 6 divisors (see below), whose sum is σ = 50429358. Its totient is φ = 14408384.

The previous prime is 28816771. The next prime is 28816793. The reversal of 28816772 is 27761882.

It can be written as a sum of positive squares in only one way, i.e., 24760576 + 4056196 = 4976^2 + 2014^2 .

It is not an unprimeable number, because it can be changed into a prime (28816771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3602093 + ... + 3602100.

It is an arithmetic number, because the mean of its divisors is an integer number (8404893).

Almost surely, 2^28816772 is an apocalyptic number.

It is an amenable number.

28816772 is a deficient number, since it is larger than the sum of its proper divisors (21612586).

28816772 is a wasteful number, since it uses less digits than its factorization.

28816772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7204197 (or 7204195 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 28816772 is about 5368.1255573990. The cubic root of 28816772 is about 306.5832639188.

The spelling of 28816772 in words is "twenty-eight million, eight hundred sixteen thousand, seven hundred seventy-two".