28135332 has 36 divisors (see below), whose sum is σ = 71420076. Its totient is φ = 9338880.

The previous prime is 28135313. The next prime is 28135337. The reversal of 28135332 is 23353182.

28135332 is a `hidden beast` number, since 281 + 353 + 32 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27625536 + 509796 = 5256^2 + 714^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28135296 and 28135305.

It is not an unprimeable number, because it can be changed into a prime (28135337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7732 + ... + 10772.

It is an arithmetic number, because the mean of its divisors is an integer number (1983891).

Almost surely, 2^28135332 is an apocalyptic number.

It is an amenable number.

28135332 is an abundant number, since it is smaller than the sum of its proper divisors (43284744).

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

28135332 is a wasteful number, since it uses less digits than its factorization.

28135332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308 (or 3303 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 28135332 is about 5304.2748797550. The cubic root of 28135332 is about 304.1473345149.

The spelling of 28135332 in words is "twenty-eight million, one hundred thirty-five thousand, three hundred thirty-two".