28136140 has 12 divisors (see below), whose sum is σ = 59085936. Its totient is φ = 11254448.

The previous prime is 28136137. The next prime is 28136149. The reversal of 28136140 is 4163182.

It is not an unprimeable number, because it can be changed into a prime (28136149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703384 + ... + 703423.

It is an arithmetic number, because the mean of its divisors is an integer number (4923828).

Almost surely, 2^28136140 is an apocalyptic number.

28136140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28136140 is an abundant number, since it is smaller than the sum of its proper divisors (30949796).

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

28136140 is a wasteful number, since it uses less digits than its factorization.

28136140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406816 (or 1406814 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 28136140 is about 5304.3510441900. The cubic root of 28136140 is about 304.1502460225.

The spelling of 28136140 in words is "twenty-eight million, one hundred thirty-six thousand, one hundred forty".