74131620 has 48 divisors (see below), whose sum is σ = 208111680. Its totient is φ = 19716736.

The previous prime is 74131601. The next prime is 74131621. The reversal of 74131620 is 2613147.

It is not an unprimeable number, because it can be changed into a prime (74131621) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 25186 + ... + 27974.

It is an arithmetic number, because the mean of its divisors is an integer number (4335660).

Almost surely, 2^74131620 is an apocalyptic number.

It is an amenable number.

74131620 is an abundant number, since it is smaller than the sum of its proper divisors (133980060).

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

74131620 is a wasteful number, since it uses less digits than its factorization.

74131620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244 (or 3242 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 74131620 is about 8609.9721253904. The cubic root of 74131620 is about 420.0824101327.

Adding to 74131620 its reverse (2613147), we get a palindrome (76744767).

The spelling of 74131620 in words is "seventy-four million, one hundred thirty-one thousand, six hundred twenty".