398494139282 has 18 divisors (see below), whose sum is σ = 599927901813. Its totient is φ = 198520824024.

The previous prime is 398494139273. The next prime is 398494139287. The reversal of 398494139282 is 282931494893.

It can be written as a sum of positive squares in 2 ways, for example, as 375328994881 + 23165144401 = 612641^2 + 152201^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=446371.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398494139287) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 311566319 + ... + 311567597.

Almost surely, 2^398494139282 is an apocalyptic number.

398494139282 is a deficient number, since it is larger than the sum of its proper divisors (201433762531).

398494139282 is an frugal number, since it uses more digits than its factorization.

398494139282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3258 (or 1630 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 62.

The spelling of 398494139282 in words is "three hundred ninety-eight billion, four hundred ninety-four million, one hundred thirty-nine thousand, two hundred eighty-two".