385807557 has 4 divisors (see below), whose sum is σ = 514410080. Its totient is φ = 257205036.

The previous prime is 385807531. The next prime is 385807603. The reversal of 385807557 is 755708583.

It is a happy number.

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.

It is not a de Polignac number, because 385807557 - 2¹² = 385803461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385807517) 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 3 ways as a sum of consecutive naturals, for example, 64301257 + ... + 64301262.

It is an arithmetic number, because the mean of its divisors is an integer number (128602520).

Almost surely, 2^385807557 is an apocalyptic number.

It is an amenable number.

385807557 is a deficient number, since it is larger than the sum of its proper divisors (128602523).

385807557 is a wasteful number, since it uses less digits than its factorization.

385807557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128602522.

The product of its (nonzero) digits is 1176000, while the sum is 48.

The square root of 385807557 is about 19641.9845484106. The cubic root of 385807557 is about 727.9869207538.

The spelling of 385807557 in words is "three hundred eighty-five million, eight hundred seven thousand, five hundred fifty-seven".