840459873 has 16 divisors (see below), whose sum is σ = 1239708672. Its totient is φ = 502194000.

The previous prime is 840459863. The next prime is 840459883. The reversal of 840459873 is 378954048.

It is an interprime number because it is at equal distance from previous prime (840459863) and next prime (840459883).

It is not a de Polignac number, because 840459873 - 2⁴ = 840459857 is a prime.

It is a super-2 number, since 2×840459873² = 1412745596246352258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (840459803) 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, 177013 + ... + 181698.

It is an arithmetic number, because the mean of its divisors is an integer number (77481792).

Almost surely, 2^840459873 is an apocalyptic number.

It is an amenable number.

840459873 is a deficient number, since it is larger than the sum of its proper divisors (399248799).

840459873 is a wasteful number, since it uses less digits than its factorization.

840459873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358796.

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 840459873 is about 28990.6859698076. The cubic root of 840459873 is about 943.7109503717.

The spelling of 840459873 in words is "eight hundred forty million, four hundred fifty-nine thousand, eight hundred seventy-three".