144640236 has 48 divisors (see below), whose sum is σ = 382592000. Its totient is φ = 42161472.

The previous prime is 144640207. The next prime is 144640273. The reversal of 144640236 is 632046441.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 21436 + ... + 27363.

Almost surely, 2^144640236 is an apocalyptic number.

It is an amenable number.

144640236 is an abundant number, since it is smaller than the sum of its proper divisors (237951764).

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

144640236 is a wasteful number, since it uses less digits than its factorization.

144640236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48838 (or 48836 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 144640236 is about 12026.6469142484. The cubic root of 144640236 is about 524.9239327433.

Adding to 144640236 its reverse (632046441), we get a palindrome (776686677).

The spelling of 144640236 in words is "one hundred forty-four million, six hundred forty thousand, two hundred thirty-six".