74644978 has 8 divisors (see below), whose sum is σ = 112097772. Its totient is φ = 37279056.

The previous prime is 74644963. The next prime is 74644981. The reversal of 74644978 is 87944647.

It can be written as a sum of positive squares in 2 ways, for example, as 55696369 + 18948609 = 7463^2 + 4353^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19525 + ... + 23032.

Almost surely, 2^74644978 is an apocalyptic number.

74644978 is a deficient number, since it is larger than the sum of its proper divisors (37452794).

74644978 is a wasteful number, since it uses less digits than its factorization.

74644978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43436.

The product of its digits is 1354752, while the sum is 49.

The square root of 74644978 is about 8639.7325190077. The cubic root of 74644978 is about 421.0498640449.

The spelling of 74644978 in words is "seventy-four million, six hundred forty-four thousand, nine hundred seventy-eight".