840848481 has 36 divisors (see below), whose sum is σ = 1347022404. Its totient is φ = 505021440.

The previous prime is 840848473. The next prime is 840848497. The reversal of 840848481 is 184848048.

It can be written as a sum of positive squares in 2 ways, for example, as 50339025 + 790509456 = 7095^2 + 28116^2 .

It is not a de Polignac number, because 840848481 - 2³ = 840848473 is a prime.

It is a super-2 number, since 2×840848481² = 1414052336000014722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (840848381) 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 35 ways as a sum of consecutive naturals, for example, 119641 + ... + 126473.

It is an arithmetic number, because the mean of its divisors is an integer number (37417289).

Almost surely, 2^840848481 is an apocalyptic number.

It is an amenable number.

840848481 is a deficient number, since it is larger than the sum of its proper divisors (506173923).

840848481 is a wasteful number, since it uses less digits than its factorization.

840848481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6974 (or 6960 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 45.

The square root of 840848481 is about 28997.3874857719. The cubic root of 840848481 is about 943.8563775474.

The spelling of 840848481 in words is "eight hundred forty million, eight hundred forty-eight thousand, four hundred eighty-one".