784047042 has 24 divisors (see below), whose sum is σ = 1715592060. Its totient is φ = 258760800.

The previous prime is 784047041. The next prime is 784047049. The reversal of 784047042 is 240740487.

It can be written as a sum of positive squares in 2 ways, for example, as 783944001 + 103041 = 27999^2 + 321^2 .

It is a super-2 number, since 2×784047042² = 1229459528137899528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 784046988 and 784047006.

It is not an unprimeable number, because it can be changed into a prime (784047041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213817 + ... + 217452.

Almost surely, 2^784047042 is an apocalyptic number.

784047042 is an abundant number, since it is smaller than the sum of its proper divisors (931545018).

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

784047042 is a wasteful number, since it uses less digits than its factorization.

784047042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431378 (or 431375 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 784047042 is about 28000.8400231136. The cubic root of 784047042 is about 922.1057005721.

The spelling of 784047042 in words is "seven hundred eighty-four million, forty-seven thousand, forty-two".