78384282790 has 24 divisors (see below), whose sum is σ = 155084277600. Its totient is φ = 28503375120.

The previous prime is 78384282751. The next prime is 78384282797. The reversal of 78384282790 is 9728248387.

It is a happy number.

It is a super-2 number, since 2×78384282790² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78384282797) 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 11 ways as a sum of consecutive naturals, for example, 32388990 + ... + 32391409.

It is an arithmetic number, because the mean of its divisors is an integer number (6461844900).

Almost surely, 2^78384282790 is an apocalyptic number.

78384282790 is a deficient number, since it is larger than the sum of its proper divisors (76699994810).

78384282790 is a wasteful number, since it uses less digits than its factorization.

78384282790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64780428 (or 64780417 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 58.

The spelling of 78384282790 in words is "seventy-eight billion, three hundred eighty-four million, two hundred eighty-two thousand, seven hundred ninety".