42638468 has 12 divisors (see below), whose sum is σ = 77190540. Its totient is φ = 20584032.

The previous prime is 42638461. The next prime is 42638471. The reversal of 42638468 is 86483624.

It can be written as a sum of positive squares in 2 ways, for example, as 25482304 + 17156164 = 5048^2 + 4142^2 .

It is not an unprimeable number, because it can be changed into a prime (42638461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183671 + ... + 183902.

It is an arithmetic number, because the mean of its divisors is an integer number (6432545).

Almost surely, 2^42638468 is an apocalyptic number.

It is an amenable number.

42638468 is a deficient number, since it is larger than the sum of its proper divisors (34552072).

42638468 is a wasteful number, since it uses less digits than its factorization.

42638468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367606 (or 367604 counting only the distinct ones).

The product of its digits is 221184, while the sum is 41.

The square root of 42638468 is about 6529.8137798868. The cubic root of 42638468 is about 349.3551882908.

The spelling of 42638468 in words is "forty-two million, six hundred thirty-eight thousand, four hundred sixty-eight".