1378223718 has 8 divisors (see below), whose sum is σ = 2756447448. Its totient is φ = 459407904.

The previous prime is 1378223689. The next prime is 1378223719. The reversal of 1378223718 is 8173228731.

It is a sphenic number, since it is the product of 3 distinct primes.

1378223718 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1378223718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378223719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114851971 + ... + 114851982.

It is an arithmetic number, because the mean of its divisors is an integer number (344555931).

Almost surely, 2^1378223718 is an apocalyptic number.

1378223718 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1378223718 is a wasteful number, since it uses less digits than its factorization.

1378223718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229703958.

The product of its digits is 112896, while the sum is 42.

The square root of 1378223718 is about 37124.4355916693. The cubic root of 1378223718 is about 1112.8583954581.

The spelling of 1378223718 in words is "one billion, three hundred seventy-eight million, two hundred twenty-three thousand, seven hundred eighteen".