28922117 has 16 divisors (see below), whose sum is σ = 35147520. Its totient is φ = 23232768.

The previous prime is 28922111. The next prime is 28922143. The reversal of 28922117 is 71122982.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28922117 - 2⁶ = 28922053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28922111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42383 + ... + 43059.

It is an arithmetic number, because the mean of its divisors is an integer number (2196720).

Almost surely, 2^28922117 is an apocalyptic number.

It is an amenable number.

28922117 is a deficient number, since it is larger than the sum of its proper divisors (6225403).

28922117 is a wasteful number, since it uses less digits than its factorization.

28922117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060.

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

The square root of 28922117 is about 5377.9286904904. The cubic root of 28922117 is about 306.9564000654.

The spelling of 28922117 in words is "twenty-eight million, nine hundred twenty-two thousand, one hundred seventeen".