74744140 has 24 divisors (see below), whose sum is σ = 157338720. Its totient is φ = 29826048.

The previous prime is 74744129. The next prime is 74744149. The reversal of 74744140 is 4144747.

It is not an unprimeable number, because it can be changed into a prime (74744149) 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, 4524 + ... + 13036.

It is an arithmetic number, because the mean of its divisors is an integer number (6555780).

Almost surely, 2^74744140 is an apocalyptic number.

It is an amenable number.

74744140 is an abundant number, since it is smaller than the sum of its proper divisors (82594580).

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

74744140 is a wasteful number, since it uses less digits than its factorization.

74744140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8961 (or 8959 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 31.

The square root of 74744140 is about 8645.4693337031. The cubic root of 74744140 is about 421.2362292134.

Adding to 74744140 its reverse (4144747), we get a palindrome (78888887).

The spelling of 74744140 in words is "seventy-four million, seven hundred forty-four thousand, one hundred forty".