380391813 has 12 divisors (see below), whose sum is σ = 581775948. Its totient is φ = 238677120.

The previous prime is 380391769. The next prime is 380391827. The reversal of 380391813 is 318193083.

It can be written as a sum of positive squares in 2 ways, for example, as 131951169 + 248440644 = 11487^2 + 15762^2 .

It is not a de Polignac number, because 380391813 - 2¹³ = 380383621 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380391853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1242958 + ... + 1243263.

It is an arithmetic number, because the mean of its divisors is an integer number (48481329).

Almost surely, 2^380391813 is an apocalyptic number.

It is an amenable number.

380391813 is a deficient number, since it is larger than the sum of its proper divisors (201384135).

380391813 is a wasteful number, since it uses less digits than its factorization.

380391813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486244 (or 2486241 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 380391813 is about 19503.6358918023. The cubic root of 380391813 is about 724.5645029423.

The spelling of 380391813 in words is "three hundred eighty million, three hundred ninety-one thousand, eight hundred thirteen".