385658081 has 4 divisors (see below), whose sum is σ = 387258564. Its totient is φ = 384057600.

The previous prime is 385658071. The next prime is 385658083. The reversal of 385658081 is 180856583.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 359443681 + 26214400 = 18959^2 + 5120^2 .

It is a de Polignac number, because none of the positive numbers 2^k-385658081 is a prime.

It is a super-2 number, since 2×385658081² = 297464310881205122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385658083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799880 + ... + 800361.

It is an arithmetic number, because the mean of its divisors is an integer number (96814641).

Almost surely, 2^385658081 is an apocalyptic number.

It is an amenable number.

385658081 is a deficient number, since it is larger than the sum of its proper divisors (1600483).

385658081 is a wasteful number, since it uses less digits than its factorization.

385658081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600482.

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 385658081 is about 19638.1791671224. The cubic root of 385658081 is about 727.8928923302.

The spelling of 385658081 in words is "three hundred eighty-five million, six hundred fifty-eight thousand, eighty-one".