390985082945 has 8 divisors (see below), whose sum is σ = 469248140520. Its totient is φ = 312744039040.

The previous prime is 390985082941. The next prime is 390985082953. The reversal of 390985082945 is 549280589093.

It is a Cunningham number, because it is equal to 625288²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 390985082944 = 1^2 + 625288^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 390985082945 - 2² = 390985082941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (390985082941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5464316 + ... + 5535405.

It is an arithmetic number, because the mean of its divisors is an integer number (58656017565).

Almost surely, 2^390985082945 is an apocalyptic number.

It is an amenable number.

390985082945 is a deficient number, since it is larger than the sum of its proper divisors (78263057575).

390985082945 is a wasteful number, since it uses less digits than its factorization.

390985082945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11006835.

The product of its (nonzero) digits is 27993600, while the sum is 62.

The spelling of 390985082945 in words is "three hundred ninety billion, nine hundred eighty-five million, eighty-two thousand, nine hundred forty-five".