38406618 has 12 divisors (see below), whose sum is σ = 83214378. Its totient is φ = 12802200.

The previous prime is 38406617. The next prime is 38406623. The reversal of 38406618 is 81660483.

It is a happy number.

38406618 is a `hidden beast` number, since 38 + 4 + 0 + 6 + 618 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30437289 + 7969329 = 5517^2 + 2823^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38406617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1066833 + ... + 1066868.

Almost surely, 2^38406618 is an apocalyptic number.

38406618 is an abundant number, since it is smaller than the sum of its proper divisors (44807760).

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

38406618 is a wasteful number, since it uses less digits than its factorization.

38406618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133709 (or 2133706 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 38406618 is about 6197.3073185054. The cubic root of 38406618 is about 337.3924463872.

The spelling of 38406618 in words is "thirty-eight million, four hundred six thousand, six hundred eighteen".