1380406191 has 8 divisors (see below), whose sum is σ = 1841318400. Its totient is φ = 919882392.

The previous prime is 1380406189. The next prime is 1380406241. The reversal of 1380406191 is 1916040831.

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

It is not a de Polignac number, because 1380406191 - 2¹ = 1380406189 is a prime.

It is a super-2 number, since 2×1380406191² = 3811042504302256962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380406141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88705 + ... + 103098.

It is an arithmetic number, because the mean of its divisors is an integer number (230164800).

Almost surely, 2^1380406191 is an apocalyptic number.

1380406191 is a deficient number, since it is larger than the sum of its proper divisors (460912209).

1380406191 is a wasteful number, since it uses less digits than its factorization.

1380406191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194205.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1380406191 is about 37153.8179868503. The cubic root of 1380406191 is about 1113.4455044231.

The spelling of 1380406191 in words is "one billion, three hundred eighty million, four hundred six thousand, one hundred ninety-one".