42706778 has 16 divisors (see below), whose sum is σ = 66286080. Its totient is φ = 20614800.

The previous prime is 42706759. The next prime is 42706799. The reversal of 42706778 is 87760724.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50483 + ... + 51321.

It is an arithmetic number, because the mean of its divisors is an integer number (4142880).

Almost surely, 2^42706778 is an apocalyptic number.

42706778 is a deficient number, since it is larger than the sum of its proper divisors (23579302).

42706778 is a wasteful number, since it uses less digits than its factorization.

42706778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 42706778 is about 6535.0423104981. The cubic root of 42706778 is about 349.5416530893.

The spelling of 42706778 in words is "forty-two million, seven hundred six thousand, seven hundred seventy-eight".