840016869 has 8 divisors (see below), whose sum is σ = 1185906240. Its totient is φ = 527069376.

The previous prime is 840016843. The next prime is 840016907. The reversal of 840016869 is 968610048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 840016869 - 2⁸ = 840016613 is a prime.

It is a super-2 number, since 2×840016869² = 1411256680409126322, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 840016869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840016169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8235409 + ... + 8235510.

It is an arithmetic number, because the mean of its divisors is an integer number (148238280).

Almost surely, 2^840016869 is an apocalyptic number.

It is an amenable number.

840016869 is a deficient number, since it is larger than the sum of its proper divisors (345889371).

840016869 is a wasteful number, since it uses less digits than its factorization.

840016869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16470939.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 840016869 is about 28983.0445088158. The cubic root of 840016869 is about 943.5451121147.

The spelling of 840016869 in words is "eight hundred forty million, sixteen thousand, eight hundred sixty-nine".