78719394 has 32 divisors (see below), whose sum is σ = 178476480. Its totient is φ = 22946112.

The previous prime is 78719371. The next prime is 78719419. The reversal of 78719394 is 49391787.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 25077 + ... + 28040.

It is an arithmetic number, because the mean of its divisors is an integer number (5577390).

Almost surely, 2^78719394 is an apocalyptic number.

78719394 is an abundant number, since it is smaller than the sum of its proper divisors (99757086).

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

78719394 is a wasteful number, since it uses less digits than its factorization.

78719394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53154.

The product of its digits is 381024, while the sum is 48.

The square root of 78719394 is about 8872.3950543244. The cubic root of 78719394 is about 428.5754081218.

The spelling of 78719394 in words is "seventy-eight million, seven hundred nineteen thousand, three hundred ninety-four".