390681105 has 16 divisors (see below), whose sum is σ = 652268160. Its totient is φ = 199303808.

The previous prime is 390681103. The next prime is 390681143. The reversal of 390681105 is 501186093.

It is a cyclic number.

It is not a de Polignac number, because 390681105 - 2¹ = 390681103 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (390681103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565860 + ... + 566549.

It is an arithmetic number, because the mean of its divisors is an integer number (40766760).

Almost surely, 2^390681105 is an apocalyptic number.

It is an amenable number.

390681105 is a deficient number, since it is larger than the sum of its proper divisors (261587055).

390681105 is a wasteful number, since it uses less digits than its factorization.

390681105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132440.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 390681105 is about 19765.6546817959. The cubic root of 390681105 is about 731.0394306410.

The spelling of 390681105 in words is "three hundred ninety million, six hundred eighty-one thousand, one hundred five".