28135912 has 32 divisors (see below), whose sum is σ = 60465600. Its totient is φ = 12023424.

The previous prime is 28135897. The next prime is 28135927. The reversal of 28135912 is 21953182.

It is an interprime number because it is at equal distance from previous prime (28135897) and next prime (28135927).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 31423 + ... + 32305.

It is an arithmetic number, because the mean of its divisors is an integer number (1889550).

Almost surely, 2^28135912 is an apocalyptic number.

It is an amenable number.

28135912 is an abundant number, since it is smaller than the sum of its proper divisors (32329688).

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

28135912 is a wasteful number, since it uses less digits than its factorization.

28135912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465 (or 1461 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 28135912 is about 5304.3295523563. The cubic root of 28135912 is about 304.1494244641.

The spelling of 28135912 in words is "twenty-eight million, one hundred thirty-five thousand, nine hundred twelve".