380842857 has 16 divisors (see below), whose sum is σ = 597401280. Its totient is φ = 238959936.

The previous prime is 380842831. The next prime is 380842871. The reversal of 380842857 is 758248083.

It is not a de Polignac number, because 380842857 - 2⁷ = 380842729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (380842157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 414403 + ... + 415320.

It is an arithmetic number, because the mean of its divisors is an integer number (37337580).

Almost surely, 2^380842857 is an apocalyptic number.

It is an amenable number.

380842857 is a deficient number, since it is larger than the sum of its proper divisors (216558423).

380842857 is a wasteful number, since it uses less digits than its factorization.

380842857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829749 (or 829743 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 380842857 is about 19515.1955409112. The cubic root of 380842857 is about 724.8507703954.

It can be divided in two parts, 3808 and 42857, that added together give a triangular number (46665 = T₃₀₅).

The spelling of 380842857 in words is "three hundred eighty million, eight hundred forty-two thousand, eight hundred fifty-seven".