42286778 has 8 divisors (see below), whose sum is σ = 63480672. Its totient is φ = 21126556.

The previous prime is 42286733. The next prime is 42286787. The reversal of 42286778 is 87768224.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5000 + ... + 10467.

It is an arithmetic number, because the mean of its divisors is an integer number (7935084).

Almost surely, 2^42286778 is an apocalyptic number.

42286778 is a deficient number, since it is larger than the sum of its proper divisors (21193894).

42286778 is a wasteful number, since it uses less digits than its factorization.

42286778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16836.

The product of its digits is 301056, while the sum is 44.

The square root of 42286778 is about 6502.8284615235. The cubic root of 42286778 is about 348.3920198021.

The spelling of 42286778 in words is "forty-two million, two hundred eighty-six thousand, seven hundred seventy-eight".