928040081 has 4 divisors (see below), whose sum is σ = 982630692. Its totient is φ = 873449472.

The previous prime is 928040063. The next prime is 928040119. The reversal of 928040081 is 180040829.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 763969600 + 164070481 = 27640^2 + 12809^2 .

It is a cyclic number.

It is not a de Polignac number, because 928040081 - 2²⁶ = 860931217 is a prime.

It is a super-2 number, since 2×928040081² = 1722516783884973122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (928045081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27295280 + ... + 27295313.

It is an arithmetic number, because the mean of its divisors is an integer number (245657673).

Almost surely, 2^928040081 is an apocalyptic number.

It is an amenable number.

928040081 is a deficient number, since it is larger than the sum of its proper divisors (54590611).

928040081 is a wasteful number, since it uses less digits than its factorization.

928040081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54590610.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 928040081 is about 30463.7502779943. The cubic root of 928040081 is about 975.4138347564.

The spelling of 928040081 in words is "nine hundred twenty-eight million, forty thousand, eighty-one".