144915540 has 144 divisors (see below), whose sum is σ = 515035584. Its totient is φ = 30105600.

The previous prime is 144915539. The next prime is 144915559. The reversal of 144915540 is 45519441.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30100 + ... + 34580.

It is an arithmetic number, because the mean of its divisors is an integer number (3576636).

Almost surely, 2^144915540 is an apocalyptic number.

144915540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 144915540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257517792).

144915540 is an abundant number, since it is smaller than the sum of its proper divisors (370120044).

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

144915540 is a wasteful number, since it uses less digits than its factorization.

144915540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4518 (or 4509 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 144915540 is about 12038.0870573360. The cubic root of 144915540 is about 525.2567632924.

The spelling of 144915540 in words is "one hundred forty-four million, nine hundred fifteen thousand, five hundred forty".