385990861 has 8 divisors (see below), whose sum is σ = 392154048. Its totient is φ = 379848000.

The previous prime is 385990811. The next prime is 385990867. The reversal of 385990861 is 168099583.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 385990861 - 2⁷ = 385990733 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 (385990867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35781 + ... + 45301.

It is an arithmetic number, because the mean of its divisors is an integer number (49019256).

Almost surely, 2^385990861 is an apocalyptic number.

It is an amenable number.

385990861 is a deficient number, since it is larger than the sum of its proper divisors (6163187).

385990861 is an equidigital number, since it uses as much as digits as its factorization.

385990861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10163.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 385990861 is about 19646.6501215856. The cubic root of 385990861 is about 728.1021956571.

The spelling of 385990861 in words is "three hundred eighty-five million, nine hundred ninety thousand, eight hundred sixty-one".