42238865 has 8 divisors (see below), whose sum is σ = 50898408. Its totient is φ = 33649920.

The previous prime is 42238841. The next prime is 42238871. The reversal of 42238865 is 56883224.

It can be written as a sum of positive squares in 4 ways, for example, as 3013696 + 39225169 = 1736^2 + 6263^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42238865 - 2²² = 38044561 is a prime.

It is a Duffinian number.

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, 16322 + ... + 18731.

It is an arithmetic number, because the mean of its divisors is an integer number (6362301).

Almost surely, 2^42238865 is an apocalyptic number.

It is an amenable number.

42238865 is a deficient number, since it is larger than the sum of its proper divisors (8659543).

42238865 is a wasteful number, since it uses less digits than its factorization.

42238865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35299.

The product of its digits is 92160, while the sum is 38.

The square root of 42238865 is about 6499.1434050958. The cubic root of 42238865 is about 348.2603883081.

The spelling of 42238865 in words is "forty-two million, two hundred thirty-eight thousand, eight hundred sixty-five".