398877869466 has 24 divisors (see below), whose sum is σ = 865692802260. Its totient is φ = 132735071616.

The previous prime is 398877869459. The next prime is 398877869503. The reversal of 398877869466 is 664968778893.

398877869466 is a `hidden beast` number, since 3 + 9 + 8 + 8 + 77 + 86 + 9 + 466 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 340272722241 + 58605147225 = 583329^2 + 242085^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18673881 + ... + 18695228.

Almost surely, 2^398877869466 is an apocalyptic number.

398877869466 is an abundant number, since it is smaller than the sum of its proper divisors (466814932794).

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

398877869466 is a wasteful number, since it uses less digits than its factorization.

398877869466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37369710 (or 37369707 counting only the distinct ones).

The product of its digits is 5267275776, while the sum is 81.

The spelling of 398877869466 in words is "three hundred ninety-eight billion, eight hundred seventy-seven million, eight hundred sixty-nine thousand, four hundred sixty-six".