385687057 has 4 divisors (see below), whose sum is σ = 440785216. Its totient is φ = 330588900.

The previous prime is 385687039. The next prime is 385687063. The reversal of 385687057 is 750786583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 750786583 = 10531 ⋅71293.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385687057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 385687057.

It is not an unprimeable number, because it can be changed into a prime (385687087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27549069 + ... + 27549082.

It is an arithmetic number, because the mean of its divisors is an integer number (110196304).

Almost surely, 2^385687057 is an apocalyptic number.

It is an amenable number.

385687057 is a deficient number, since it is larger than the sum of its proper divisors (55098159).

385687057 is an equidigital number, since it uses as much as digits as its factorization.

385687057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55098158.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The square root of 385687057 is about 19638.9168998700. The cubic root of 385687057 is about 727.9111216870.

The spelling of 385687057 in words is "three hundred eighty-five million, six hundred eighty-seven thousand, fifty-seven".