840928801 has 4 divisors (see below), whose sum is σ = 841002372. Its totient is φ = 840855232.

The previous prime is 840928789. The next prime is 840928811. The reversal of 840928801 is 108829048.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 487526400 + 353402401 = 22080^2 + 18799^2 .

It is a cyclic number.

It is not a de Polignac number, because 840928801 - 2²³ = 832540193 is a prime.

It is a super-2 number, since 2×840928801² = 1414322496702595202, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840928811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15556 + ... + 43861.

It is an arithmetic number, because the mean of its divisors is an integer number (210250593).

Almost surely, 2^840928801 is an apocalyptic number.

It is an amenable number.

840928801 is a deficient number, since it is larger than the sum of its proper divisors (73571).

840928801 is a wasteful number, since it uses less digits than its factorization.

840928801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73570.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 840928801 is about 28998.7724050519. The cubic root of 840928801 is about 943.8864297832.

The spelling of 840928801 in words is "eight hundred forty million, nine hundred twenty-eight thousand, eight hundred one".