144638618 has 16 divisors (see below), whose sum is σ = 233616960. Its totient is φ = 66910656.

The previous prime is 144638609. The next prime is 144638687. The reversal of 144638618 is 816836441.

It is a Curzon number.

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, 34046 + ... + 38057.

It is an arithmetic number, because the mean of its divisors is an integer number (14601060).

Almost surely, 2^144638618 is an apocalyptic number.

144638618 is a deficient number, since it is larger than the sum of its proper divisors (88978342).

144638618 is a wasteful number, since it uses less digits than its factorization.

144638618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72181.

The product of its digits is 110592, while the sum is 41.

The square root of 144638618 is about 12026.5796467657. The cubic root of 144638618 is about 524.9219754039.

The spelling of 144638618 in words is "one hundred forty-four million, six hundred thirty-eight thousand, six hundred eighteen".