78819345 has 32 divisors (see below), whose sum is σ = 152864640. Its totient is φ = 38214720.

The previous prime is 78819337. The next prime is 78819359. The reversal of 78819345 is 54391887.

It is not a de Polignac number, because 78819345 - 2³ = 78819337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 78819345.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25054 + ... + 28023.

It is an arithmetic number, because the mean of its divisors is an integer number (4777020).

Almost surely, 2^78819345 is an apocalyptic number.

It is an amenable number.

78819345 is a deficient number, since it is larger than the sum of its proper divisors (74045295).

78819345 is a wasteful number, since it uses less digits than its factorization.

78819345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53102 (or 53096 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 78819345 is about 8878.0259630168. The cubic root of 78819345 is about 428.7567205921.

The spelling of 78819345 in words is "seventy-eight million, eight hundred nineteen thousand, three hundred forty-five".