385280866 has 16 divisors (see below), whose sum is σ = 603840384. Its totient is φ = 184022784.

The previous prime is 385280839. The next prime is 385280881. The reversal of 385280866 is 668082583.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a plaindrome in base 7.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32770 + ... + 42946.

It is an arithmetic number, because the mean of its divisors is an integer number (37740024).

Almost surely, 2^385280866 is an apocalyptic number.

385280866 is a deficient number, since it is larger than the sum of its proper divisors (218559518).

385280866 is a wasteful number, since it uses less digits than its factorization.

385280866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11025.

The product of its (nonzero) digits is 552960, while the sum is 46.

The square root of 385280866 is about 19628.5726939072. The cubic root of 385280866 is about 727.6554957866.

The spelling of 385280866 in words is "three hundred eighty-five million, two hundred eighty thousand, eight hundred sixty-six".