42868906 has 4 divisors (see below), whose sum is σ = 64303362. Its totient is φ = 21434452.

The previous prime is 42868901. The next prime is 42868907. The reversal of 42868906 is 60986824.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 29800681 + 13068225 = 5459^2 + 3615^2 .

It is not an unprimeable number, because it can be changed into a prime (42868901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10717225 + ... + 10717228.

Almost surely, 2^42868906 is an apocalyptic number.

42868906 is a deficient number, since it is larger than the sum of its proper divisors (21434456).

42868906 is a wasteful number, since it uses less digits than its factorization.

42868906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21434455.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 42868906 is about 6547.4350703157. The cubic root of 42868906 is about 349.9834169014.

The spelling of 42868906 in words is "forty-two million, eight hundred sixty-eight thousand, nine hundred six".