1380305371 has 4 divisors (see below), whose sum is σ = 1440318672. Its totient is φ = 1320292072.

The previous prime is 1380305363. The next prime is 1380305383. The reversal of 1380305371 is 1735030831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1735030831 = 2687 ⋅645713.

It is a cyclic number.

It is not a de Polignac number, because 1380305371 - 2³ = 1380305363 is a prime.

It is a super-2 number, since 2×1380305371² = 3810485834422895282, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1380305321) 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, 30006616 + ... + 30006661.

It is an arithmetic number, because the mean of its divisors is an integer number (360079668).

Almost surely, 2^1380305371 is an apocalyptic number.

1380305371 is a deficient number, since it is larger than the sum of its proper divisors (60013301).

1380305371 is an equidigital number, since it uses as much as digits as its factorization.

1380305371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60013300.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 1380305371 is about 37152.4611701567. The cubic root of 1380305371 is about 1113.4183963855.

The spelling of 1380305371 in words is "one billion, three hundred eighty million, three hundred five thousand, three hundred seventy-one".