144640036 has 24 divisors (see below), whose sum is σ = 255850560. Its totient is φ = 71544672.

The previous prime is 144640019. The next prime is 144640037. The reversal of 144640036 is 630046441.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 144639986 and 144640013.

It is not an unprimeable number, because it can be changed into a prime (144640037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195355 + ... + 196093.

It is an arithmetic number, because the mean of its divisors is an integer number (10660440).

Almost surely, 2^144640036 is an apocalyptic number.

It is an amenable number.

144640036 is a deficient number, since it is larger than the sum of its proper divisors (111210524).

144640036 is a wasteful number, since it uses less digits than its factorization.

144640036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203 (or 1201 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 144640036 is about 12026.6385993760. The cubic root of 144640036 is about 524.9236907986.

Adding to 144640036 its reverse (630046441), we get a palindrome (774686477).

The spelling of 144640036 in words is "one hundred forty-four million, six hundred forty thousand, thirty-six".