74827978 has 8 divisors (see below), whose sum is σ = 112656960. Its totient is φ = 37275660.

The previous prime is 74827967. The next prime is 74828003. The reversal of 74827978 is 87972847.

It is a happy number.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68488 + ... + 69571.

It is an arithmetic number, because the mean of its divisors is an integer number (14082120).

Almost surely, 2^74827978 is an apocalyptic number.

74827978 is a deficient number, since it is larger than the sum of its proper divisors (37828982).

74827978 is a wasteful number, since it uses less digits than its factorization.

74827978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138332.

The product of its digits is 1580544, while the sum is 52.

The square root of 74827978 is about 8650.3166416034. The cubic root of 74827978 is about 421.3936658905.

The spelling of 74827978 in words is "seventy-four million, eight hundred twenty-seven thousand, nine hundred seventy-eight".