78840102 has 16 divisors (see below), whose sum is σ = 172014912. Its totient is φ = 23890920.

The previous prime is 78840077. The next prime is 78840109. The reversal of 78840102 is 20104887.

It is a self number, because there is not a number n which added to its sum of digits gives 78840102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78840109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 597208 + ... + 597339.

It is an arithmetic number, because the mean of its divisors is an integer number (10750932).

Almost surely, 2^78840102 is an apocalyptic number.

78840102 is an abundant number, since it is smaller than the sum of its proper divisors (93174810).

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

78840102 is a wasteful number, since it uses less digits than its factorization.

78840102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194563.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 78840102 is about 8879.1948959351. The cubic root of 78840102 is about 428.7943548477.

Adding to 78840102 its reverse (20104887), we get a palindrome (98944989).

The spelling of 78840102 in words is "seventy-eight million, eight hundred forty thousand, one hundred two".