42339864 has 64 divisors (see below), whose sum is σ = 123805440. Its totient is φ = 11813760.

The previous prime is 42339863. The next prime is 42339889. The reversal of 42339864 is 46893324.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42339863) 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, 4294 + ... + 10154.

It is an arithmetic number, because the mean of its divisors is an integer number (1934460).

Almost surely, 2^42339864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42339864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61902720).

42339864 is an abundant number, since it is smaller than the sum of its proper divisors (81465576).

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

42339864 is a wasteful number, since it uses less digits than its factorization.

42339864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5920 (or 5916 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The square root of 42339864 is about 6506.9089435768. The cubic root of 42339864 is about 348.5377470303.

The spelling of 42339864 in words is "forty-two million, three hundred thirty-nine thousand, eight hundred sixty-four".