28540332 has 36 divisors (see below), whose sum is σ = 75282480. Its totient is φ = 9099552.

The previous prime is 28540319. The next prime is 28540333. The reversal of 28540332 is 23304582.

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

It is a junction number, because it is equal to n+sod(n) for n = 28540296 and 28540305.

It is not an unprimeable number, because it can be changed into a prime (28540333) 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, 16407 + ... + 18062.

It is an arithmetic number, because the mean of its divisors is an integer number (2091180).

Almost surely, 2^28540332 is an apocalyptic number.

It is an amenable number.

28540332 is an abundant number, since it is smaller than the sum of its proper divisors (46742148).

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

28540332 is a wasteful number, since it uses less digits than its factorization.

28540332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34502 (or 34497 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 28540332 is about 5342.3152284379. The cubic root of 28540332 is about 305.5997586641.

The spelling of 28540332 in words is "twenty-eight million, five hundred forty thousand, three hundred thirty-two".