144040020 has 24 divisors (see below), whose sum is σ = 403312224. Its totient is φ = 38410656.

The previous prime is 144039983. The next prime is 144040033. The reversal of 144040020 is 20040441.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1200274 + ... + 1200393.

It is an arithmetic number, because the mean of its divisors is an integer number (16804676).

Almost surely, 2^144040020 is an apocalyptic number.

144040020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144040020 is an abundant number, since it is smaller than the sum of its proper divisors (259272204).

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

144040020 is a wasteful number, since it uses less digits than its factorization.

144040020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400679 (or 2400677 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 144040020 is about 12001.6673841596. The cubic root of 144040020 is about 524.1968308584.

Adding to 144040020 its reverse (20040441), we get a palindrome (164080461).

The spelling of 144040020 in words is "one hundred forty-four million, forty thousand, twenty".