381375306 has 24 divisors (see below), whose sum is σ = 889876260. Its totient is φ = 117346176.

The previous prime is 381375283. The next prime is 381375311. The reversal of 381375306 is 603573183.

It can be written as a sum of positive squares in 2 ways, for example, as 379899081 + 1476225 = 19491^2 + 1215^2 .

It is a nialpdrome in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 814671 + ... + 815138.

Almost surely, 2^381375306 is an apocalyptic number.

381375306 is an abundant number, since it is smaller than the sum of its proper divisors (508500954).

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

381375306 is a wasteful number, since it uses less digits than its factorization.

381375306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629830 (or 1629827 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 381375306 is about 19528.8326840085. The cubic root of 381375306 is about 725.1884130207.

The spelling of 381375306 in words is "three hundred eighty-one million, three hundred seventy-five thousand, three hundred six".