385781337 has 24 divisors (see below), whose sum is σ = 573487200. Its totient is φ = 249758208.

The previous prime is 385781321. The next prime is 385781443. The reversal of 385781337 is 733187583.

385781337 is a `hidden beast` number, since 38 + 578 + 13 + 37 = 666.

It is not a de Polignac number, because 385781337 - 2⁴ = 385781321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 385781292 and 385781301.

It is not an unprimeable number, because it can be changed into a prime (385781537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66489 + ... + 72057.

It is an arithmetic number, because the mean of its divisors is an integer number (23895300).

Almost surely, 2^385781337 is an apocalyptic number.

It is an amenable number.

385781337 is a deficient number, since it is larger than the sum of its proper divisors (187705863).

385781337 is a wasteful number, since it uses less digits than its factorization.

385781337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5797 (or 5794 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 385781337 is about 19641.3170892382. The cubic root of 385781337 is about 727.9704287238.

The spelling of 385781337 in words is "three hundred eighty-five million, seven hundred eighty-one thousand, three hundred thirty-seven".