42438907 has 16 divisors (see below), whose sum is σ = 50348032. Its totient is φ = 35004960.

The previous prime is 42438899. The next prime is 42438911. The reversal of 42438907 is 70983424.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42438907 - 2³ = 42438899 is a prime.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (42438917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47953 + ... + 48829.

It is an arithmetic number, because the mean of its divisors is an integer number (3146752).

Almost surely, 2^42438907 is an apocalyptic number.

42438907 is a deficient number, since it is larger than the sum of its proper divisors (7909125).

42438907 is a wasteful number, since it uses less digits than its factorization.

42438907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 42438907 is about 6514.5151009112. The cubic root of 42438907 is about 348.8093062556.

The spelling of 42438907 in words is "forty-two million, four hundred thirty-eight thousand, nine hundred seven".