74425640 has 16 divisors (see below), whose sum is σ = 167457780. Its totient is φ = 29770240.

The previous prime is 74425639. The next prime is 74425667. The reversal of 74425640 is 4652447.

It can be written as a sum of positive squares in 2 ways, for example, as 74063236 + 362404 = 8606^2 + 602^2 .

It is a junction number, because it is equal to n+sod(n) for n = 74425597 and 74425606.

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 3 ways as a sum of consecutive naturals, for example, 930281 + ... + 930360.

Almost surely, 2^74425640 is an apocalyptic number.

It is an amenable number.

74425640 is an abundant number, since it is smaller than the sum of its proper divisors (93032140).

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

74425640 is a wasteful number, since it uses less digits than its factorization.

74425640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860652 (or 1860648 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 74425640 is about 8627.0296162700. The cubic root of 74425640 is about 420.6370528867.

The spelling of 74425640 in words is "seventy-four million, four hundred twenty-five thousand, six hundred forty".