385281011 has 4 divisors (see below), whose sum is σ = 386642712. Its totient is φ = 383919312.

The previous prime is 385281007. The next prime is 385281019. The reversal of 385281011 is 110182583.

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

It is a cyclic number.

It is not a de Polignac number, because 385281011 - 2² = 385281007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385281019) 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, 680426 + ... + 680991.

It is an arithmetic number, because the mean of its divisors is an integer number (96660678).

Almost surely, 2^385281011 is an apocalyptic number.

385281011 is a deficient number, since it is larger than the sum of its proper divisors (1361701).

385281011 is a wasteful number, since it uses less digits than its factorization.

385281011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361700.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 385281011 is about 19628.5763875020. The cubic root of 385281011 is about 727.6555870707.

The spelling of 385281011 in words is "three hundred eighty-five million, two hundred eighty-one thousand, eleven".