144644540 has 12 divisors (see below), whose sum is σ = 303753576. Its totient is φ = 57857808.

The previous prime is 144644531. The next prime is 144644611. The reversal of 144644540 is 45446441.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 144644497 and 144644506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3616094 + ... + 3616133.

It is an arithmetic number, because the mean of its divisors is an integer number (25312798).

Almost surely, 2^144644540 is an apocalyptic number.

144644540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144644540 is an abundant number, since it is smaller than the sum of its proper divisors (159109036).

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

144644540 is a wasteful number, since it uses less digits than its factorization.

144644540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7232236 (or 7232234 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

The square root of 144644540 is about 12026.8258489096. The cubic root of 144644540 is about 524.9291393402.

The spelling of 144644540 in words is "one hundred forty-four million, six hundred forty-four thousand, five hundred forty".