42771808 has 12 divisors (see below), whose sum is σ = 84207060. Its totient is φ = 21385888.

The previous prime is 42771803. The next prime is 42771821. The reversal of 42771808 is 80817724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42771803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 668278 + ... + 668341.

It is an arithmetic number, because the mean of its divisors is an integer number (7017255).

Almost surely, 2^42771808 is an apocalyptic number.

It is an amenable number.

42771808 is a deficient number, since it is larger than the sum of its proper divisors (41435252).

42771808 is a wasteful number, since it uses less digits than its factorization.

42771808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336629 (or 1336621 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 42771808 is about 6540.0159021213. The cubic root of 42771808 is about 349.7189798674.

The spelling of 42771808 in words is "forty-two million, seven hundred seventy-one thousand, eight hundred eight".