390745729 has 8 divisors (see below), whose sum is σ = 428182272. Its totient is φ = 353628240.

The previous prime is 390745727. The next prime is 390745753. The reversal of 390745729 is 927547093.

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 390745729 - 2¹ = 390745727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390745727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77194 + ... + 82099.

It is an arithmetic number, because the mean of its divisors is an integer number (53522784).

Almost surely, 2^390745729 is an apocalyptic number.

It is an amenable number.

390745729 is a deficient number, since it is larger than the sum of its proper divisors (37436543).

390745729 is a wasteful number, since it uses less digits than its factorization.

390745729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159527.

The product of its (nonzero) digits is 476280, while the sum is 46.

The square root of 390745729 is about 19767.2893690561. The cubic root of 390745729 is about 731.0797363933.

The spelling of 390745729 in words is "three hundred ninety million, seven hundred forty-five thousand, seven hundred twenty-nine".