42398636 has 24 divisors (see below), whose sum is σ = 84946176. Its totient is φ = 18138960.

The previous prime is 42398627. The next prime is 42398651. The reversal of 42398636 is 63689324.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 42398593 and 42398602.

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, 22241 + ... + 24071.

It is an arithmetic number, because the mean of its divisors is an integer number (3539424).

Almost surely, 2^42398636 is an apocalyptic number.

It is an amenable number.

42398636 is an abundant number, since it is smaller than the sum of its proper divisors (42547540).

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

42398636 is a wasteful number, since it uses less digits than its factorization.

42398636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669 (or 2667 counting only the distinct ones).

The product of its digits is 186624, while the sum is 41.

The square root of 42398636 is about 6511.4235002801. The cubic root of 42398636 is about 348.6989409798.

It can be divided in two parts, 42398 and 636, that added together give a palindrome (43034).

The spelling of 42398636 in words is "forty-two million, three hundred ninety-eight thousand, six hundred thirty-six".