400011618 has 8 divisors (see below), whose sum is σ = 800023248. Its totient is φ = 133337204.

The previous prime is 400011553. The next prime is 400011637. The reversal of 400011618 is 816110004.

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

400011618 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 400011594 and 400011603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33334296 + ... + 33334307.

It is an arithmetic number, because the mean of its divisors is an integer number (100002906).

Almost surely, 2^400011618 is an apocalyptic number.

400011618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

400011618 is a wasteful number, since it uses less digits than its factorization.

400011618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66668608.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 400011618 is about 20000.2904478910. The cubic root of 400011618 is about 736.8134331720.

The spelling of 400011618 in words is "four hundred million, eleven thousand, six hundred eighteen".