28137916 has 6 divisors (see below), whose sum is σ = 49241360. Its totient is φ = 14068956.

The previous prime is 28137877. The next prime is 28137919. The reversal of 28137916 is 61973182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28137919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3517236 + ... + 3517243.

Almost surely, 2^28137916 is an apocalyptic number.

It is an amenable number.

28137916 is a deficient number, since it is larger than the sum of its proper divisors (21103444).

28137916 is a wasteful number, since it uses less digits than its factorization.

28137916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034483 (or 7034481 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 28137916 is about 5304.5184512828. The cubic root of 28137916 is about 304.1566453778.

The spelling of 28137916 in words is "twenty-eight million, one hundred thirty-seven thousand, nine hundred sixteen".