28470911 has 24 divisors (see below), whose sum is σ = 35581680. Its totient is φ = 22643712.

The previous prime is 28470907. The next prime is 28470917. The reversal of 28470911 is 11907482.

It is not a de Polignac number, because 28470911 - 2² = 28470907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28470917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49055 + ... + 49631.

It is an arithmetic number, because the mean of its divisors is an integer number (1482570).

Almost surely, 2^28470911 is an apocalyptic number.

28470911 is a deficient number, since it is larger than the sum of its proper divisors (7110769).

28470911 is a wasteful number, since it uses less digits than its factorization.

28470911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 28470911 is about 5335.8139960085. The cubic root of 28470911 is about 305.3517790079.

The spelling of 28470911 in words is "twenty-eight million, four hundred seventy thousand, nine hundred eleven".