840404152 has 16 divisors (see below), whose sum is σ = 1800866160. Its totient is φ = 360173184.

The previous prime is 840404099. The next prime is 840404161. The reversal of 840404152 is 251404048.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 840404152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7503553 + ... + 7503664.

It is an arithmetic number, because the mean of its divisors is an integer number (112554135).

Almost surely, 2^840404152 is an apocalyptic number.

It is an amenable number.

840404152 is an abundant number, since it is smaller than the sum of its proper divisors (960462008).

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

840404152 is a wasteful number, since it uses less digits than its factorization.

840404152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15007230 (or 15007226 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 840404152 is about 28989.7249383294. The cubic root of 840404152 is about 943.6900944564.

The spelling of 840404152 in words is "eight hundred forty million, four hundred four thousand, one hundred fifty-two".