144639700 has 18 divisors (see below), whose sum is σ = 313868366. Its totient is φ = 57855840.

The previous prime is 144639683. The next prime is 144639749. The reversal of 144639700 is 7936441.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 24561936 + 120077764 = 4956^2 + 10958^2 .

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 723099 + ... + 723298.

Almost surely, 2^144639700 is an apocalyptic number.

144639700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144639700 is an abundant number, since it is smaller than the sum of its proper divisors (169228666).

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

144639700 is a wasteful number, since it uses less digits than its factorization.

144639700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446411 (or 1446404 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 144639700 is about 12026.6246303774. The cubic root of 144639700 is about 524.9232843309.

The spelling of 144639700 in words is "one hundred forty-four million, six hundred thirty-nine thousand, seven hundred".