405049018 has 8 divisors (see below), whose sum is σ = 662807520. Its totient is φ = 184113180.

The previous prime is 405049013. The next prime is 405049031. The reversal of 405049018 is 810940504.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (405049013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9205638 + ... + 9205681.

It is an arithmetic number, because the mean of its divisors is an integer number (82850940).

Almost surely, 2^405049018 is an apocalyptic number.

405049018 is a deficient number, since it is larger than the sum of its proper divisors (257758502).

405049018 is a wasteful number, since it uses less digits than its factorization.

405049018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18411332.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 405049018 is about 20125.8296226516. The cubic root of 405049018 is about 739.8934701773.

The spelling of 405049018 in words is "four hundred five million, forty-nine thousand, eighteen".