840203361 has 24 divisors (see below), whose sum is σ = 1263886624. Its totient is φ = 557772480.

The previous prime is 840203347. The next prime is 840203369. The reversal of 840203361 is 163302048.

It is a happy number.

It is not a de Polignac number, because 840203361 - 2⁶ = 840203297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840203369) 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 23 ways as a sum of consecutive naturals, for example, 51390 + ... + 65736.

Almost surely, 2^840203361 is an apocalyptic number.

840203361 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

840203361 is a deficient number, since it is larger than the sum of its proper divisors (423683263).

840203361 is a wasteful number, since it uses less digits than its factorization.

840203361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14603 (or 14591 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 840203361 is about 28986.2615906225. The cubic root of 840203361 is about 943.6149323771.

The spelling of 840203361 in words is "eight hundred forty million, two hundred three thousand, three hundred sixty-one".