42389618 has 8 divisors (see below), whose sum is σ = 63694512. Its totient is φ = 21158116.

The previous prime is 42389603. The next prime is 42389623. The reversal of 42389618 is 81698324.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16880 + ... + 19227.

It is an arithmetic number, because the mean of its divisors is an integer number (7961814).

Almost surely, 2^42389618 is an apocalyptic number.

42389618 is a deficient number, since it is larger than the sum of its proper divisors (21304894).

42389618 is a wasteful number, since it uses less digits than its factorization.

42389618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36696.

The product of its digits is 82944, while the sum is 41.

The square root of 42389618 is about 6510.7309881456. The cubic root of 42389618 is about 348.6742169924.

The spelling of 42389618 in words is "forty-two million, three hundred eighty-nine thousand, six hundred eighteen".