1380143205 has 80 divisors (see below), whose sum is σ = 2925141120. Its totient is φ = 609130368.

The previous prime is 1380143159. The next prime is 1380143231. The reversal of 1380143205 is 5023410831.

It is a happy number.

It is not a de Polignac number, because 1380143205 - 2¹⁵ = 1380110437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 73822 + ... + 90608.

It is an arithmetic number, because the mean of its divisors is an integer number (36564264).

Almost surely, 2^1380143205 is an apocalyptic number.

1380143205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1380143205 is an abundant number, since it is smaller than the sum of its proper divisors (1544997915).

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

1380143205 is a wasteful number, since it uses less digits than its factorization.

1380143205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16840 (or 16831 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1380143205 is about 37150.2786665188. The cubic root of 1380143205 is about 1113.3747911363.

The spelling of 1380143205 in words is "one billion, three hundred eighty million, one hundred forty-three thousand, two hundred five".