28136992 has 48 divisors (see below), whose sum is σ = 60117120. Its totient is φ = 12886272.

The previous prime is 28136971. The next prime is 28137013. The reversal of 28136992 is 29963182.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28136971) and next prime (28137013).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99283 + ... + 99565.

It is an arithmetic number, because the mean of its divisors is an integer number (1252440).

Almost surely, 2^28136992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28136992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30058560).

28136992 is an abundant number, since it is smaller than the sum of its proper divisors (31980128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28136992 is a wasteful number, since it uses less digits than its factorization.

28136992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 537 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 28136992 is about 5304.4313550088. The cubic root of 28136992 is about 304.1533160171.

It can be divided in two parts, 281 and 36992, that added together give a palindrome (37273).

The spelling of 28136992 in words is "twenty-eight million, one hundred thirty-six thousand, nine hundred ninety-two".