381857011 has 8 divisors (see below), whose sum is σ = 388464224. Its totient is φ = 375261120.

The previous prime is 381856987. The next prime is 381857033. The reversal of 381857011 is 110758183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381857011 - 2⁷ = 381856883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381857711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92095 + ... + 96151.

It is an arithmetic number, because the mean of its divisors is an integer number (48558028).

Almost surely, 2^381857011 is an apocalyptic number.

381857011 is a deficient number, since it is larger than the sum of its proper divisors (6607213).

381857011 is a wasteful number, since it uses less digits than its factorization.

381857011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5661.

The product of its (nonzero) digits is 6720, while the sum is 34.

The square root of 381857011 is about 19541.1619664748. The cubic root of 381857011 is about 725.4936066248.

The spelling of 381857011 in words is "three hundred eighty-one million, eight hundred fifty-seven thousand, eleven".