42404418 has 32 divisors (see below), whose sum is σ = 107694720. Its totient is φ = 12115440.

The previous prime is 42404363. The next prime is 42404419. The reversal of 42404418 is 81440424.

It is a happy number.

42404418 is a `hidden beast` number, since 4 + 240 + 4 + 418 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 42404391 and 42404400.

It is not an unprimeable number, because it can be changed into a prime (42404419) 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, 55713 + ... + 56468.

It is an arithmetic number, because the mean of its divisors is an integer number (3365460).

Almost surely, 2^42404418 is an apocalyptic number.

42404418 is an abundant number, since it is smaller than the sum of its proper divisors (65290302).

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

42404418 is a wasteful number, since it uses less digits than its factorization.

42404418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112199 (or 112193 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 42404418 is about 6511.8674740815. The cubic root of 42404418 is about 348.7147912195.

The spelling of 42404418 in words is "forty-two million, four hundred four thousand, four hundred eighteen".