42443770 has 8 divisors (see below), whose sum is σ = 76398804. Its totient is φ = 16977504.

The previous prime is 42443767. The next prime is 42443783. The reversal of 42443770 is 7734424.

It can be written as a sum of positive squares in 2 ways, for example, as 36397089 + 6046681 = 6033^2 + 2459^2 .

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

It is a super-2 number, since 2×42443770² = 3602947223625800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2122179 + ... + 2122198.

Almost surely, 2^42443770 is an apocalyptic number.

42443770 is a deficient number, since it is larger than the sum of its proper divisors (33955034).

42443770 is a wasteful number, since it uses less digits than its factorization.

42443770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244384.

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 42443770 is about 6514.8883336555. Note that the first 3 decimals coincide. The cubic root of 42443770 is about 348.8226288958.

The spelling of 42443770 in words is "forty-two million, four hundred forty-three thousand, seven hundred seventy".