840724242 has 16 divisors (see below), whose sum is σ = 1681767360. Its totient is φ = 280188272.

The previous prime is 840724193. The next prime is 840724253. The reversal of 840724242 is 242427048.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33859 + ... + 53177.

It is an arithmetic number, because the mean of its divisors is an integer number (105110460).

Almost surely, 2^840724242 is an apocalyptic number.

840724242 is an abundant number, since it is smaller than the sum of its proper divisors (841043118).

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

840724242 is a wasteful number, since it uses less digits than its factorization.

840724242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26577.

The product of its (nonzero) digits is 28672, while the sum is 33.

The square root of 840724242 is about 28995.2451619227. The cubic root of 840724242 is about 943.8098889702.

The spelling of 840724242 in words is "eight hundred forty million, seven hundred twenty-four thousand, two hundred forty-two".