42944690 has 8 divisors (see below), whose sum is σ = 77300460. Its totient is φ = 17177872.

The previous prime is 42944689. The next prime is 42944701. The reversal of 42944690 is 9644924.

It can be written as a sum of positive squares in 2 ways, for example, as 36012001 + 6932689 = 6001^2 + 2633^2 .

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

It is a super-2 number, since 2×42944690² = 3688492798392200, 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, 2147225 + ... + 2147244.

Almost surely, 2^42944690 is an apocalyptic number.

42944690 is a deficient number, since it is larger than the sum of its proper divisors (34355770).

42944690 is a wasteful number, since it uses less digits than its factorization.

42944690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4294476.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 42944690 is about 6553.2198192949. The cubic root of 42944690 is about 350.1895300013.

It can be divided in two parts, 42944 and 690, that added together give a palindrome (43634).

The spelling of 42944690 in words is "forty-two million, nine hundred forty-four thousand, six hundred ninety".