74646405 has 24 divisors (see below), whose sum is σ = 136999512. Its totient is φ = 37469184.

The previous prime is 74646367. The next prime is 74646449. The reversal of 74646405 is 50464647.

74646405 is a `hidden beast` number, since 7 + 4 + 6 + 4 + 640 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4639716 + 70006689 = 2154^2 + 8367^2 .

It is not a de Polignac number, because 74646405 - 2¹⁷ = 74515333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74646405.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 48024 + ... + 49553.

It is an arithmetic number, because the mean of its divisors is an integer number (5708313).

Almost surely, 2^74646405 is an apocalyptic number.

It is an amenable number.

74646405 is a deficient number, since it is larger than the sum of its proper divisors (62353107).

74646405 is a wasteful number, since it uses less digits than its factorization.

74646405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97605 (or 97602 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 74646405 is about 8639.8151021882. The cubic root of 74646405 is about 421.0525471203.

The spelling of 74646405 in words is "seventy-four million, six hundred forty-six thousand, four hundred five".