840071361 has 16 divisors (see below), whose sum is σ = 1143151488. Its totient is φ = 548620800.

The previous prime is 840071357. The next prime is 840071363. The reversal of 840071361 is 163170048.

It is a happy number.

It is not a de Polignac number, because 840071361 - 2² = 840071357 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840071363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20881 + ... + 46001.

It is an arithmetic number, because the mean of its divisors is an integer number (71446968).

Almost surely, 2^840071361 is an apocalyptic number.

It is an amenable number.

840071361 is a deficient number, since it is larger than the sum of its proper divisors (303080127).

840071361 is a wasteful number, since it uses less digits than its factorization.

840071361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25352.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 840071361 is about 28983.9845604430. The cubic root of 840071361 is about 943.5655143036.

The spelling of 840071361 in words is "eight hundred forty million, seventy-one thousand, three hundred sixty-one".