42856378 has 4 divisors (see below), whose sum is σ = 64284570. Its totient is φ = 21428188.

The previous prime is 42856351. The next prime is 42856391. The reversal of 42856378 is 87365824.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 41822089 + 1034289 = 6467^2 + 1017^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10714093 + ... + 10714096.

Almost surely, 2^42856378 is an apocalyptic number.

42856378 is a deficient number, since it is larger than the sum of its proper divisors (21428192).

42856378 is a wasteful number, since it uses less digits than its factorization.

42856378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21428191.

The product of its digits is 322560, while the sum is 43.

The square root of 42856378 is about 6546.4782898899. The cubic root of 42856378 is about 349.9493205532.

It can be divided in two parts, 42856 and 378, that added together give a palindrome (43234).

The spelling of 42856378 in words is "forty-two million, eight hundred fifty-six thousand, three hundred seventy-eight".