28238516 has 6 divisors (see below), whose sum is σ = 49417410. Its totient is φ = 14119256.

The previous prime is 28238447. The next prime is 28238519. The reversal of 28238516 is 61583282.

It can be written as a sum of positive squares in only one way, i.e., 21715600 + 6522916 = 4660^2 + 2554^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28238519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3529811 + ... + 3529818.

It is an arithmetic number, because the mean of its divisors is an integer number (8236235).

Almost surely, 2^28238516 is an apocalyptic number.

It is an amenable number.

28238516 is a deficient number, since it is larger than the sum of its proper divisors (21178894).

28238516 is a wasteful number, since it uses less digits than its factorization.

28238516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7059633 (or 7059631 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 28238516 is about 5313.9924727083. The cubic root of 28238516 is about 304.5186926294.

The spelling of 28238516 in words is "twenty-eight million, two hundred thirty-eight thousand, five hundred sixteen".