74885945 has 16 divisors (see below), whose sum is σ = 91263888. Its totient is φ = 58982400.

The previous prime is 74885939. The next prime is 74885947. The reversal of 74885945 is 54958847.

It can be written as a sum of positive squares in 8 ways, for example, as 46199209 + 28686736 = 6797^2 + 5356^2 .

It is not a de Polignac number, because 74885945 - 2¹⁰ = 74884921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74885893 and 74885902.

It is not an unprimeable number, because it can be changed into a prime (74885947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129497 + ... + 130073.

It is an arithmetic number, because the mean of its divisors is an integer number (5703993).

Almost surely, 2^74885945 is an apocalyptic number.

It is an amenable number.

74885945 is a deficient number, since it is larger than the sum of its proper divisors (16377943).

74885945 is a wasteful number, since it uses less digits than its factorization.

74885945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940.

The product of its digits is 1612800, while the sum is 50.

The square root of 74885945 is about 8653.6665639485. Note that the first 3 decimals coincide. The cubic root of 74885945 is about 421.5024515007.

The spelling of 74885945 in words is "seventy-four million, eight hundred eighty-five thousand, nine hundred forty-five".