928288991 has 4 divisors (see below), whose sum is σ = 1060901712. Its totient is φ = 795676272.

The previous prime is 928288987. The next prime is 928288997. The reversal of 928288991 is 199882829.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 928288991 - 2² = 928288987 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 (928288997) 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 3 ways as a sum of consecutive naturals, for example, 66306350 + ... + 66306363.

It is an arithmetic number, because the mean of its divisors is an integer number (265225428).

Almost surely, 2^928288991 is an apocalyptic number.

928288991 is a deficient number, since it is larger than the sum of its proper divisors (132612721).

928288991 is a wasteful number, since it uses less digits than its factorization.

928288991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132612720.

The product of its digits is 1492992, while the sum is 56.

The square root of 928288991 is about 30467.8353513997. The cubic root of 928288991 is about 975.5010323389.

The spelling of 928288991 in words is "nine hundred twenty-eight million, two hundred eighty-eight thousand, nine hundred ninety-one".