42256778 has 8 divisors (see below), whose sum is σ = 63413280. Its totient is φ = 21119020.

The previous prime is 42256777. The next prime is 42256811. The reversal of 42256778 is 87765224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42256777) 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, 4763 + ... + 10353.

It is an arithmetic number, because the mean of its divisors is an integer number (7926660).

Almost surely, 2^42256778 is an apocalyptic number.

42256778 is a deficient number, since it is larger than the sum of its proper divisors (21156502).

42256778 is a wasteful number, since it uses less digits than its factorization.

42256778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9372.

The product of its digits is 188160, while the sum is 41.

The square root of 42256778 is about 6500.5213637061. The cubic root of 42256778 is about 348.3096123791.

It can be divided in two parts, 42256 and 778, that added together give a palindrome (43034).

The spelling of 42256778 in words is "forty-two million, two hundred fifty-six thousand, seven hundred seventy-eight".