74144140 has 48 divisors (see below), whose sum is σ = 188419392. Its totient is φ = 23924736.

The previous prime is 74144131. The next prime is 74144173. The reversal of 74144140 is 4144147.

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 15 ways as a sum of consecutive naturals, for example, 13197 + ... + 17956.

It is an arithmetic number, because the mean of its divisors is an integer number (3925404).

Almost surely, 2^74144140 is an apocalyptic number.

74144140 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

74144140 is an abundant number, since it is smaller than the sum of its proper divisors (114275252).

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

74144140 is a wasteful number, since it uses less digits than its factorization.

74144140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31186 (or 31184 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 74144140 is about 8610.6991586050. The cubic root of 74144140 is about 420.1060578722.

Adding to 74144140 its reverse (4144147), we get a palindrome (78288287).

The spelling of 74144140 in words is "seventy-four million, one hundred forty-four thousand, one hundred forty".