840848004 has 18 divisors (see below), whose sum is σ = 2125476990. Its totient is φ = 280282656.

The previous prime is 840848003. The next prime is 840848093. The reversal of 840848004 is 400848048.

It can be written as a sum of positive squares in only one way, i.e., 632623104 + 208224900 = 25152^2 + 14430^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 23356889 = 840848004 / (8 + 4 + 0 + 8 + 4 + 8 + 0 + 0 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 840848004.

It is not an unprimeable number, because it can be changed into a prime (840848003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11678409 + ... + 11678480.

It is an arithmetic number, because the mean of its divisors is an integer number (118082055).

Almost surely, 2^840848004 is an apocalyptic number.

It is an amenable number.

840848004 is an abundant number, since it is smaller than the sum of its proper divisors (1284628986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

840848004 is a wasteful number, since it uses less digits than its factorization.

840848004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23356899 (or 23356894 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 36.

The square root of 840848004 is about 28997.3792608918. The cubic root of 840848004 is about 943.8561990691.

The spelling of 840848004 in words is "eight hundred forty million, eight hundred forty-eight thousand, four".