74077785 has 12 divisors (see below), whose sum is σ = 128401572. Its totient is φ = 39508128.

The previous prime is 74077771. The next prime is 74077793. The reversal of 74077785 is 58777047.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42302016 + 31775769 = 6504^2 + 5637^2 .

It is not a de Polignac number, because 74077785 - 2⁴ = 74077769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1646173 = 74077785 / (7 + 4 + 0 + 7 + 7 + 7 + 8 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74077785.

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 11 ways as a sum of consecutive naturals, for example, 823042 + ... + 823131.

It is an arithmetic number, because the mean of its divisors is an integer number (10700131).

Almost surely, 2^74077785 is an apocalyptic number.

It is an amenable number.

74077785 is a deficient number, since it is larger than the sum of its proper divisors (54323787).

74077785 is a wasteful number, since it uses less digits than its factorization.

74077785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646184 (or 1646181 counting only the distinct ones).

The product of its (nonzero) digits is 384160, while the sum is 45.

The square root of 74077785 is about 8606.8452408534. The cubic root of 74077785 is about 419.9806963917.

The spelling of 74077785 in words is "seventy-four million, seventy-seven thousand, seven hundred eighty-five".