381636307 has 6 divisors (see below), whose sum is σ = 413251332. Its totient is φ = 352279512.

The previous prime is 381636293. The next prime is 381636329. The reversal of 381636307 is 703636183.

It is not a de Polignac number, because 381636307 - 2¹¹ = 381634259 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (381636347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1128933 + ... + 1129270.

It is an arithmetic number, because the mean of its divisors is an integer number (68875222).

Almost surely, 2^381636307 is an apocalyptic number.

381636307 is a deficient number, since it is larger than the sum of its proper divisors (31615025).

381636307 is a wasteful number, since it uses less digits than its factorization.

381636307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258229 (or 2258216 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 381636307 is about 19535.5139937499. The cubic root of 381636307 is about 725.3538071757.

The spelling of 381636307 in words is "three hundred eighty-one million, six hundred thirty-six thousand, three hundred seven".