74978282 has 8 divisors (see below), whose sum is σ = 116345700. Its totient is φ = 36196384.

The previous prime is 74978263. The next prime is 74978287. The reversal of 74978282 is 28287947.

It is a happy number.

It is a Cunningham number, because it is equal to 8659²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 74978281 + 1 = 8659^2 + 1^2 .

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

It is not an unprimeable number, because it can be changed into a prime (74978287) 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 3 ways as a sum of consecutive naturals, for example, 646307 + ... + 646422.

Almost surely, 2^74978282 is an apocalyptic number.

74978282 is a deficient number, since it is larger than the sum of its proper divisors (41367418).

74978282 is a wasteful number, since it uses less digits than its factorization.

74978282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292760.

The product of its digits is 451584, while the sum is 47.

The square root of 74978282 is about 8659.0000577434. Note that the first 4 decimals coincide. The cubic root of 74978282 is about 421.6756227864.

The spelling of 74978282 in words is "seventy-four million, nine hundred seventy-eight thousand, two hundred eighty-two".