78909614 has 16 divisors (see below), whose sum is σ = 143231328. Its totient is φ = 31828992.

The previous prime is 78909599. The next prime is 78909617. The reversal of 78909614 is 41690987.

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 (78909617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165539 + ... + 166014.

It is an arithmetic number, because the mean of its divisors is an integer number (8951958).

Almost surely, 2^78909614 is an apocalyptic number.

78909614 is a deficient number, since it is larger than the sum of its proper divisors (64321714).

78909614 is a wasteful number, since it uses less digits than its factorization.

78909614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331579.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 78909614 is about 8883.1083523731. The cubic root of 78909614 is about 428.9203381007.

The spelling of 78909614 in words is "seventy-eight million, nine hundred nine thousand, six hundred fourteen".