74843645 has 8 divisors (see below), whose sum is σ = 91285080. Its totient is φ = 58893120.

The previous prime is 74843591. The next prime is 74843647. The reversal of 74843645 is 54634847.

It can be written as a sum of positive squares in 4 ways, for example, as 2627641 + 72216004 = 1621^2 + 8498^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74843645 - 2¹⁴ = 74827261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74843647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122390 + ... + 122999.

It is an arithmetic number, because the mean of its divisors is an integer number (11410635).

Almost surely, 2^74843645 is an apocalyptic number.

It is an amenable number.

74843645 is a deficient number, since it is larger than the sum of its proper divisors (16441435).

74843645 is a wasteful number, since it uses less digits than its factorization.

74843645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245455.

The product of its digits is 322560, while the sum is 41.

The square root of 74843645 is about 8651.2221679945. Note that the first 3 decimals coincide. The cubic root of 74843645 is about 421.4230734020.

The spelling of 74843645 in words is "seventy-four million, eight hundred forty-three thousand, six hundred forty-five".