75144144 has 40 divisors (see below), whose sum is σ = 198862272. Its totient is φ = 24436480.

The previous prime is 75144109. The next prime is 75144149. The reversal of 75144144 is 44144157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75144149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17124 + ... + 21059.

Almost surely, 2^75144144 is an apocalyptic number.

It is an amenable number.

75144144 is an abundant number, since it is smaller than the sum of its proper divisors (123718128).

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

75144144 is a wasteful number, since it uses less digits than its factorization.

75144144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38235 (or 38229 counting only the distinct ones).

The product of its digits is 8960, while the sum is 30.

The square root of 75144144 is about 8668.5722007722. The cubic root of 75144144 is about 421.9863281061.

The spelling of 75144144 in words is "seventy-five million, one hundred forty-four thousand, one hundred forty-four".