42788351394 has 12 divisors (see below), whose sum is σ = 92708094726. Its totient is φ = 14262783792.

The previous prime is 42788351393. The next prime is 42788351423. The reversal of 42788351394 is 49315388724.

It is a happy number.

42788351394 is a `hidden beast` number, since 42 + 7 + 8 + 83 + 513 + 9 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 42780717225 + 7634169 = 206835^2 + 2763^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42788351394.

It is not an unprimeable number, because it can be changed into a prime (42788351393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1188565299 + ... + 1188565334.

Almost surely, 2^42788351394 is an apocalyptic number.

42788351394 is an abundant number, since it is smaller than the sum of its proper divisors (49919743332).

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

42788351394 is a wasteful number, since it uses less digits than its factorization.

42788351394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377130641 (or 2377130638 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 42788351394 in words is "forty-two billion, seven hundred eighty-eight million, three hundred fifty-one thousand, three hundred ninety-four".