840244252 has 24 divisors (see below), whose sum is σ = 1530144000. Its totient is φ = 403391856.

The previous prime is 840244241. The next prime is 840244259. The reversal of 840244252 is 252442048.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840244259) 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, 31252 + ... + 51547.

It is an arithmetic number, because the mean of its divisors is an integer number (63756000).

Almost surely, 2^840244252 is an apocalyptic number.

It is an amenable number.

840244252 is a deficient number, since it is larger than the sum of its proper divisors (689899748).

840244252 is a wasteful number, since it uses less digits than its factorization.

840244252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82905 (or 82903 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 31.

The square root of 840244252 is about 28986.9669334341. The cubic root of 840244252 is about 943.6302400729.

The spelling of 840244252 in words is "eight hundred forty million, two hundred forty-four thousand, two hundred fifty-two".