78909102 has 12 divisors (see below), whose sum is σ = 170969760. Its totient is φ = 26303028.

The previous prime is 78909079. The next prime is 78909119. The reversal of 78909102 is 20190987.

It is a happy number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 2191902 + ... + 2191937.

It is an arithmetic number, because the mean of its divisors is an integer number (14247480).

Almost surely, 2^78909102 is an apocalyptic number.

78909102 is an abundant number, since it is smaller than the sum of its proper divisors (92060658).

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

78909102 is a wasteful number, since it uses less digits than its factorization.

78909102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4383847 (or 4383844 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 78909102 is about 8883.0795335852. The cubic root of 78909102 is about 428.9194104246.

The spelling of 78909102 in words is "seventy-eight million, nine hundred nine thousand, one hundred two".