28150816 has 12 divisors (see below), whose sum is σ = 55421982. Its totient is φ = 14075392.

The previous prime is 28150813. The next prime is 28150817. The reversal of 28150816 is 61805182.

It can be written as a sum of positive squares in only one way, i.e., 25603600 + 2547216 = 5060^2 + 1596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28150813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439825 + ... + 439888.

Almost surely, 2^28150816 is an apocalyptic number.

It is an amenable number.

28150816 is a deficient number, since it is larger than the sum of its proper divisors (27271166).

28150816 is an equidigital number, since it uses as much as digits as its factorization.

28150816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879723 (or 879715 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 28150816 is about 5305.7342564437. The cubic root of 28150816 is about 304.2031191024.

Adding to 28150816 its reverse (61805182), we get a palindrome (89955998).

The spelling of 28150816 in words is "twenty-eight million, one hundred fifty thousand, eight hundred sixteen".