840551052 has 96 divisors (see below), whose sum is σ = 2235421440. Its totient is φ = 243544320.

The previous prime is 840551011. The next prime is 840551093. The reversal of 840551052 is 250155048.

It is an interprime number because it is at equal distance from previous prime (840551011) and next prime (840551093).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 286698 + ... + 289614.

It is an arithmetic number, because the mean of its divisors is an integer number (23285640).

Almost surely, 2^840551052 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840551052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1117710720).

840551052 is an abundant number, since it is smaller than the sum of its proper divisors (1394870388).

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

840551052 is a wasteful number, since it uses less digits than its factorization.

840551052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3031 (or 3029 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 840551052 is about 28992.2584839471. The cubic root of 840551052 is about 943.7450759388.

The spelling of 840551052 in words is "eight hundred forty million, five hundred fifty-one thousand, fifty-two".