1380718845 has 32 divisors (see below), whose sum is σ = 2677760640. Its totient is φ = 669438720.

The previous prime is 1380718817. The next prime is 1380718849. The reversal of 1380718845 is 5488170831.

It is a happy number.

It is not a de Polignac number, because 1380718845 - 2¹² = 1380714749 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1380718845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380718849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 463404 + ... + 466373.

It is an arithmetic number, because the mean of its divisors is an integer number (83680020).

Almost surely, 2^1380718845 is an apocalyptic number.

1380718845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1380718845 is a deficient number, since it is larger than the sum of its proper divisors (1297041795).

1380718845 is a wasteful number, since it uses less digits than its factorization.

1380718845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929802 (or 929796 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The square root of 1380718845 is about 37158.0253108262. The cubic root of 1380718845 is about 1113.5295610614.

The spelling of 1380718845 in words is "one billion, three hundred eighty million, seven hundred eighteen thousand, eight hundred forty-five".