3870388857 has 8 divisors (see below), whose sum is σ = 5160820576. Its totient is φ = 2580108192.

The previous prime is 3870388831. The next prime is 3870388867. The reversal of 3870388857 is 7588830783.

It is a happy number.

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

It is not a de Polignac number, because 3870388857 - 2¹² = 3870384761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3870388797 and 3870388806.

It is not an unprimeable number, because it can be changed into a prime (3870388867) 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, 53613 + ... + 103029.

It is an arithmetic number, because the mean of its divisors is an integer number (645102572).

Almost surely, 2^3870388857 is an apocalyptic number.

It is an amenable number.

3870388857 is a deficient number, since it is larger than the sum of its proper divisors (1290431719).

3870388857 is a wasteful number, since it uses less digits than its factorization.

3870388857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75527.

The product of its (nonzero) digits is 9031680, while the sum is 57.

The square root of 3870388857 is about 62212.4493730957. The cubic root of 3870388857 is about 1570.0670528653.

The spelling of 3870388857 in words is "three billion, eight hundred seventy million, three hundred eighty-eight thousand, eight hundred fifty-seven".