390728666287 has 8 divisors (see below), whose sum is σ = 392204721600. Its totient is φ = 389252785824.

The previous prime is 390728666243. The next prime is 390728666303. The reversal of 390728666287 is 782666827093.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390728666287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390728661287) 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, 6005889 + ... + 6070597.

It is an arithmetic number, because the mean of its divisors is an integer number (49025590200).

Almost surely, 2^390728666287 is an apocalyptic number.

390728666287 is a deficient number, since it is larger than the sum of its proper divisors (1476055313).

390728666287 is a wasteful number, since it uses less digits than its factorization.

390728666287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87425.

The product of its (nonzero) digits is 73156608, while the sum is 64.

The spelling of 390728666287 in words is "three hundred ninety billion, seven hundred twenty-eight million, six hundred sixty-six thousand, two hundred eighty-seven".