74447778 has 8 divisors (see below), whose sum is σ = 148895568. Its totient is φ = 24815924.

The previous prime is 74447773. The next prime is 74447797. The reversal of 74447778 is 87774447.

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

74447778 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74447773) by changing a digit.

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, 6203976 + ... + 6203987.

It is an arithmetic number, because the mean of its divisors is an integer number (18611946).

Almost surely, 2^74447778 is an apocalyptic number.

74447778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74447778 is a wasteful number, since it uses less digits than its factorization.

74447778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12407968.

The product of its digits is 1229312, while the sum is 48.

The square root of 74447778 is about 8628.3125812641. The cubic root of 74447778 is about 420.6787550919.

The spelling of 74447778 in words is "seventy-four million, four hundred forty-seven thousand, seven hundred seventy-eight".