842681378 has 32 divisors (see below), whose sum is σ = 1599464448. Its totient is φ = 323413200.

The previous prime is 842681353. The next prime is 842681423. The reversal of 842681378 is 873186248.

It is a super-2 number, since 2×842681378² = 1420223809655957768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30518 + ... + 51153.

It is an arithmetic number, because the mean of its divisors is an integer number (49983264).

Almost surely, 2^842681378 is an apocalyptic number.

842681378 is a deficient number, since it is larger than the sum of its proper divisors (756783070).

842681378 is a wasteful number, since it uses less digits than its factorization.

842681378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81758.

The product of its digits is 516096, while the sum is 47.

The square root of 842681378 is about 29028.9748010501. The cubic root of 842681378 is about 944.5416916713.

The spelling of 842681378 in words is "eight hundred forty-two million, six hundred eighty-one thousand, three hundred seventy-eight".