840302255 has 16 divisors (see below), whose sum is σ = 1095900960. Its totient is φ = 614832768.

The previous prime is 840302207. The next prime is 840302261. The reversal of 840302255 is 552203048.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840302255 is a prime.

It is a super-2 number, since 2×840302255² = 1412215759516170050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52217 + ... + 66386.

It is an arithmetic number, because the mean of its divisors is an integer number (68493810).

Almost surely, 2^840302255 is an apocalyptic number.

840302255 is a deficient number, since it is larger than the sum of its proper divisors (255598705).

840302255 is a wasteful number, since it uses less digits than its factorization.

840302255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118730.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 840302255 is about 28987.9674175338. The cubic root of 840302255 is about 943.6519528567.

The spelling of 840302255 in words is "eight hundred forty million, three hundred two thousand, two hundred fifty-five".