42388818 has 16 divisors (see below), whose sum is σ = 84897120. Its totient is φ = 14109696.

The previous prime is 42388813. The next prime is 42388859. The reversal of 42388818 is 81888324.

It is a self number, because there is not a number n which added to its sum of digits gives 42388818.

It is not an unprimeable number, because it can be changed into a prime (42388813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21 + ... + 9207.

It is an arithmetic number, because the mean of its divisors is an integer number (5306070).

Almost surely, 2^42388818 is an apocalyptic number.

42388818 is an abundant number, since it is smaller than the sum of its proper divisors (42508302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42388818 is a wasteful number, since it uses less digits than its factorization.

42388818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9961.

The product of its digits is 98304, while the sum is 42.

The square root of 42388818 is about 6510.6695508219. The cubic root of 42388818 is about 348.6720235219.

The spelling of 42388818 in words is "forty-two million, three hundred eighty-eight thousand, eight hundred eighteen".