28540885 has 8 divisors (see below), whose sum is σ = 34283520. Its totient is φ = 22809744.

The previous prime is 28540849. The next prime is 28540921. The reversal of 28540885 is 58804582.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28540849) and next prime (28540921).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28540885 - 2¹⁷ = 28409813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4164 + ... + 8626.

It is an arithmetic number, because the mean of its divisors is an integer number (4285440).

Almost surely, 2^28540885 is an apocalyptic number.

It is an amenable number.

28540885 is a deficient number, since it is larger than the sum of its proper divisors (5742635).

28540885 is a wasteful number, since it uses less digits than its factorization.

28540885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5747.

The product of its (nonzero) digits is 102400, while the sum is 40.

The square root of 28540885 is about 5342.3669847737. The cubic root of 28540885 is about 305.6017324274.

The spelling of 28540885 in words is "twenty-eight million, five hundred forty thousand, eight hundred eighty-five".