398466828642 has 32 divisors (see below), whose sum is σ = 808479584640. Its totient is φ = 130907553920.

The previous prime is 398466828607. The next prime is 398466828647. The reversal of 398466828642 is 246828664893.

It is not an unprimeable number, because it can be changed into a prime (398466828647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1033593 + ... + 1365740.

It is an arithmetic number, because the mean of its divisors is an integer number (25264987020).

Almost surely, 2^398466828642 is an apocalyptic number.

398466828642 is an abundant number, since it is smaller than the sum of its proper divisors (410012755998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398466828642 is a wasteful number, since it uses less digits than its factorization.

398466828642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399738.

The product of its digits is 191102976, while the sum is 66.

The spelling of 398466828642 in words is "three hundred ninety-eight billion, four hundred sixty-six million, eight hundred twenty-eight thousand, six hundred forty-two".