42439908 has 24 divisors (see below), whose sum is σ = 113173312. Its totient is φ = 12125664.

The previous prime is 42439867. The next prime is 42439931. The reversal of 42439908 is 80993424.

It is a super-2 number, since 2×42439908² = 3602291582096928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252535 + ... + 252702.

Almost surely, 2^42439908 is an apocalyptic number.

It is an amenable number.

42439908 is an abundant number, since it is smaller than the sum of its proper divisors (70733404).

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

42439908 is a wasteful number, since it uses less digits than its factorization.

42439908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505251 (or 505249 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 42439908 is about 6514.5919288932. The cubic root of 42439908 is about 348.8120486713.

The spelling of 42439908 in words is "forty-two million, four hundred thirty-nine thousand, nine hundred eight".