42808394 has 16 divisors (see below), whose sum is σ = 65534400. Its totient is φ = 20966304.

The previous prime is 42808393. The next prime is 42808417. The reversal of 42808394 is 49380824.

It is not an unprimeable number, because it can be changed into a prime (42808393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47819 + ... + 48705.

It is an arithmetic number, because the mean of its divisors is an integer number (4095900).

Almost surely, 2^42808394 is an apocalyptic number.

42808394 is a deficient number, since it is larger than the sum of its proper divisors (22726006).

42808394 is a wasteful number, since it uses less digits than its factorization.

42808394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 42808394 is about 6542.8123922362. The cubic root of 42808394 is about 349.8186652505.

The spelling of 42808394 in words is "forty-two million, eight hundred eight thousand, three hundred ninety-four".