74389816 has 16 divisors (see below), whose sum is σ = 140318640. Its totient is φ = 36971520.

The previous prime is 74389789. The next prime is 74389817. The reversal of 74389816 is 61898347.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74389817) 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, 26505 + ... + 29176.

It is an arithmetic number, because the mean of its divisors is an integer number (8769915).

Almost surely, 2^74389816 is an apocalyptic number.

It is an amenable number.

74389816 is a deficient number, since it is larger than the sum of its proper divisors (65928824).

74389816 is a wasteful number, since it uses less digits than its factorization.

74389816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55854 (or 55850 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 74389816 is about 8624.9531013218. The cubic root of 74389816 is about 420.5695523130.

The spelling of 74389816 in words is "seventy-four million, three hundred eighty-nine thousand, eight hundred sixteen".