42638912 has 14 divisors (see below), whose sum is σ = 84611718. Its totient is φ = 21319424.

The previous prime is 42638899. The next prime is 42638933. The reversal of 42638912 is 21983624.

It can be written as a sum of positive squares in only one way, i.e., 42198016 + 440896 = 6496^2 + 664^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333053 + ... + 333180.

Almost surely, 2^42638912 is an apocalyptic number.

It is an amenable number.

42638912 is a deficient number, since it is larger than the sum of its proper divisors (41972806).

42638912 is an equidigital number, since it uses as much as digits as its factorization.

42638912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666245 (or 666235 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 42638912 is about 6529.8477777051. The cubic root of 42638912 is about 349.3564009138.

The spelling of 42638912 in words is "forty-two million, six hundred thirty-eight thousand, nine hundred twelve".