28084945 has 32 divisors (see below), whose sum is σ = 40953600. Its totient is φ = 18061056.

The previous prime is 28084939. The next prime is 28084951. The reversal of 28084945 is 54948082.

It is an interprime number because it is at equal distance from previous prime (28084939) and next prime (28084951).

It is a cyclic number.

It is not a de Polignac number, because 28084945 - 2³ = 28084937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28084898 and 28084907.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104271 + ... + 104539.

It is an arithmetic number, because the mean of its divisors is an integer number (1279800).

Almost surely, 2^28084945 is an apocalyptic number.

It is an amenable number.

28084945 is a deficient number, since it is larger than the sum of its proper divisors (12868655).

28084945 is a wasteful number, since it uses less digits than its factorization.

28084945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 28084945 is about 5299.5230917508. The cubic root of 28084945 is about 303.9656622400.

The spelling of 28084945 in words is "twenty-eight million, eighty-four thousand, nine hundred forty-five".