385888513 has 4 divisors (see below), whose sum is σ = 386263108. Its totient is φ = 385513920.

The previous prime is 385888511. The next prime is 385888541. The reversal of 385888513 is 315888583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315888583 = 269 ⋅1174307.

It can be written as a sum of positive squares in 2 ways, for example, as 288728064 + 97160449 = 16992^2 + 9857^2 .

It is a cyclic number.

It is not a de Polignac number, because 385888513 - 2¹ = 385888511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385888511) 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, 185748 + ... + 187813.

It is an arithmetic number, because the mean of its divisors is an integer number (96565777).

Almost surely, 2^385888513 is an apocalyptic number.

It is an amenable number.

385888513 is a deficient number, since it is larger than the sum of its proper divisors (374595).

385888513 is a wasteful number, since it uses less digits than its factorization.

385888513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374594.

The product of its digits is 921600, while the sum is 49.

The square root of 385888513 is about 19644.0452300436. The cubic root of 385888513 is about 728.0378362827.

The spelling of 385888513 in words is "three hundred eighty-five million, eight hundred eighty-eight thousand, five hundred thirteen".