42706438 has 4 divisors (see below), whose sum is σ = 64059660. Its totient is φ = 21353218.

The previous prime is 42706427. The next prime is 42706441. The reversal of 42706438 is 83460724.

It is a semiprime because it is the product of two primes.

It is a congruent 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 as a sum of consecutive naturals, namely, 10676608 + ... + 10676611.

It is an arithmetic number, because the mean of its divisors is an integer number (16014915).

Almost surely, 2^42706438 is an apocalyptic number.

42706438 is a deficient number, since it is larger than the sum of its proper divisors (21353222).

42706438 is a wasteful number, since it uses less digits than its factorization.

42706438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21353221.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 42706438 is about 6535.0162968427. The cubic root of 42706438 is about 349.5407254888.

The spelling of 42706438 in words is "forty-two million, seven hundred six thousand, four hundred thirty-eight".