42778353728 has 28 divisors (see below), whose sum is σ = 92605414992. Its totient is φ = 19444705920.

The previous prime is 42778353727. The next prime is 42778353773. The reversal of 42778353728 is 82735387724.

It is not an unprimeable number, because it can be changed into a prime (42778353727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30381650 + ... + 30383057.

Almost surely, 2^42778353728 is an apocalyptic number.

It is an amenable number.

42778353728 is an abundant number, since it is smaller than the sum of its proper divisors (49827061264).

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

42778353728 is a wasteful number, since it uses less digits than its factorization.

42778353728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60764730 (or 60764720 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 56.

The spelling of 42778353728 in words is "forty-two billion, seven hundred seventy-eight million, three hundred fifty-three thousand, seven hundred twenty-eight".