42638628 has 24 divisors (see below), whose sum is σ = 101805088. Its totient is φ = 13882176.

The previous prime is 42638627. The next prime is 42638633. The reversal of 42638628 is 82683624.

It is not an unprimeable number, because it can be changed into a prime (42638623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40801 + ... + 41832.

Almost surely, 2^42638628 is an apocalyptic number.

It is an amenable number.

42638628 is an abundant number, since it is smaller than the sum of its proper divisors (59166460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42638628 is a wasteful number, since it uses less digits than its factorization.

42638628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82683 (or 82681 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 42638628 is about 6529.8260313733. The cubic root of 42638628 is about 349.3556252730.

The spelling of 42638628 in words is "forty-two million, six hundred thirty-eight thousand, six hundred twenty-eight".