145144240 has 40 divisors (see below), whose sum is σ = 337969440. Its totient is φ = 57970176.

The previous prime is 145144213. The next prime is 145144253. The reversal of 145144240 is 42441541.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 89517 + ... + 91123.

It is an arithmetic number, because the mean of its divisors is an integer number (8449236).

Almost surely, 2^145144240 is an apocalyptic number.

145144240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145144240 is an abundant number, since it is smaller than the sum of its proper divisors (192825200).

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

145144240 is a wasteful number, since it uses less digits than its factorization.

145144240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749 (or 2743 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 145144240 is about 12047.5823300777. The cubic root of 145144240 is about 525.5329312458.

Adding to 145144240 its reverse (42441541), we get a palindrome (187585781).

The spelling of 145144240 in words is "one hundred forty-five million, one hundred forty-four thousand, two hundred forty".