74389785 has 64 divisors (see below), whose sum is σ = 130394880. Its totient is φ = 36126720.

The previous prime is 74389723. The next prime is 74389787. The reversal of 74389785 is 58798347.

It is not a de Polignac number, because 74389785 - 2⁷ = 74389657 is a prime.

It is a super-2 number, since 2×74389785² = 11067680224692450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74389787) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 766857 + ... + 766953.

It is an arithmetic number, because the mean of its divisors is an integer number (2037420).

Almost surely, 2^74389785 is an apocalyptic number.

It is an amenable number.

74389785 is a deficient number, since it is larger than the sum of its proper divisors (56005095).

74389785 is a wasteful number, since it uses less digits than its factorization.

74389785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218.

The product of its digits is 1693440, while the sum is 51.

The square root of 74389785 is about 8624.9513042104. The cubic root of 74389785 is about 420.5694938926.

The spelling of 74389785 in words is "seventy-four million, three hundred eighty-nine thousand, seven hundred eighty-five".