144987420 has 48 divisors (see below), whose sum is σ = 408038400. Its totient is φ = 38465856.

The previous prime is 144987379. The next prime is 144987421. The reversal of 144987420 is 24789441.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144987421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5869 + ... + 18011.

It is an arithmetic number, because the mean of its divisors is an integer number (8500800).

Almost surely, 2^144987420 is an apocalyptic number.

144987420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144987420 is an abundant number, since it is smaller than the sum of its proper divisors (263050980).

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

144987420 is a wasteful number, since it uses less digits than its factorization.

144987420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12354 (or 12352 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 144987420 is about 12041.0722113938. The cubic root of 144987420 is about 525.3435936753.

The spelling of 144987420 in words is "one hundred forty-four million, nine hundred eighty-seven thousand, four hundred twenty".