842378427 has 64 divisors (see below), whose sum is σ = 1433272320. Its totient is φ = 483991200.

The previous prime is 842378423. The next prime is 842378429. The reversal of 842378427 is 724873248.

It is not a de Polignac number, because 842378427 - 2² = 842378423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (842378423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 867052 + ... + 868022.

It is an arithmetic number, because the mean of its divisors is an integer number (22394880).

Almost surely, 2^842378427 is an apocalyptic number.

842378427 is a deficient number, since it is larger than the sum of its proper divisors (590893893).

842378427 is a wasteful number, since it uses less digits than its factorization.

842378427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141 (or 1135 counting only the distinct ones).

The product of its digits is 602112, while the sum is 45.

The square root of 842378427 is about 29023.7562524219. The cubic root of 842378427 is about 944.4284878929.

The spelling of 842378427 in words is "eight hundred forty-two million, three hundred seventy-eight thousand, four hundred twenty-seven".