842605740 has 120 divisors (see below), whose sum is σ = 2668537872. Its totient is φ = 222549120.

The previous prime is 842605717. The next prime is 842605741. The reversal of 842605740 is 47506248.

842605740 is a `hidden beast` number, since 8 + 4 + 2 + 605 + 7 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 842605695 and 842605704.

It is not an unprimeable number, because it can be changed into a prime (842605741) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 170910 + ... + 175770.

Almost surely, 2^842605740 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 842605740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1334268936).

842605740 is an abundant number, since it is smaller than the sum of its proper divisors (1825932132).

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

842605740 is a wasteful number, since it uses less digits than its factorization.

842605740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4989 (or 4978 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 842605740 is about 29027.6719700358. The cubic root of 842605740 is about 944.5134305420.

It can be divided in two parts, 84260 and 5740, that added together give a square (90000 = 300²).

The spelling of 842605740 in words is "eight hundred forty-two million, six hundred five thousand, seven hundred forty".