768210381 has 6 divisors (see below), whose sum is σ = 1109637230. Its totient is φ = 512140248.

The previous prime is 768210371. The next prime is 768210383. The reversal of 768210381 is 183012867.

768210381 is a `hidden beast` number, since 7 + 68 + 210 + 381 = 666.

It can be written as a sum of positive squares in only one way, i.e., 712409481 + 55800900 = 26691^2 + 7470^2 .

It is not a de Polignac number, because 768210381 - 2¹³ = 768202189 is a prime.

It is a super-2 number, since 2×768210381² = 1180294378952330322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768210383) 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, 42678346 + ... + 42678363.

Almost surely, 2^768210381 is an apocalyptic number.

It is an amenable number.

768210381 is a deficient number, since it is larger than the sum of its proper divisors (341426849).

768210381 is a wasteful number, since it uses less digits than its factorization.

768210381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85356715 (or 85356712 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 768210381 is about 27716.6083964110. The cubic root of 768210381 is about 915.8550065914.

The spelling of 768210381 in words is "seven hundred sixty-eight million, two hundred ten thousand, three hundred eighty-one".