28137316 has 24 divisors (see below), whose sum is σ = 51815736. Its totient is φ = 13351680.

The previous prime is 28137311. The next prime is 28137341. The reversal of 28137316 is 61373182.

28137316 = T₁₁₅₁ + T₁₁₅₂ + ... + T₁₁₉₁.

It can be written as a sum of positive squares in 4 ways, for example, as 1201216 + 26936100 = 1096^2 + 5190^2 .

It is not an unprimeable number, because it can be changed into a prime (28137311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3750 + ... + 8386.

It is an arithmetic number, because the mean of its divisors is an integer number (2158989).

Almost surely, 2^28137316 is an apocalyptic number.

It is an amenable number.

28137316 is a deficient number, since it is larger than the sum of its proper divisors (23678420).

28137316 is a wasteful number, since it uses less digits than its factorization.

28137316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4719 (or 4717 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 28137316 is about 5304.4618954235. The cubic root of 28137316 is about 304.1544834636.

It can be divided in two parts, 2 and 8137316, that added together give a palindrome (8137318).

The spelling of 28137316 in words is "twenty-eight million, one hundred thirty-seven thousand, three hundred sixteen".