390040165 has 16 divisors (see below), whose sum is σ = 476028288. Its totient is φ = 306732096.

The previous prime is 390040153. The next prime is 390040181. The reversal of 390040165 is 561040093.

It is a cyclic number.

It is not a de Polignac number, because 390040165 - 2¹⁹ = 389515877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 217864 + ... + 219646.

It is an arithmetic number, because the mean of its divisors is an integer number (29751768).

Almost surely, 2^390040165 is an apocalyptic number.

It is an amenable number.

390040165 is a deficient number, since it is larger than the sum of its proper divisors (85988123).

390040165 is a wasteful number, since it uses less digits than its factorization.

390040165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 390040165 is about 19749.4345488675. The cubic root of 390040165 is about 730.6394378493.

The spelling of 390040165 in words is "three hundred ninety million, forty thousand, one hundred sixty-five".