398661471888 has 40 divisors (see below), whose sum is σ = 1029903778368. Its totient is φ = 132883504512.

The previous prime is 398661471799. The next prime is 398661472009. The reversal of 398661471888 is 888174166893.

It is a super-2 number, since 2×398661471888² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2088381 + ... + 2271267.

Almost surely, 2^398661471888 is an apocalyptic number.

It is an amenable number.

398661471888 is an abundant number, since it is smaller than the sum of its proper divisors (631242306480).

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

398661471888 is a wasteful number, since it uses less digits than its factorization.

398661471888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228311 (or 228305 counting only the distinct ones).

The product of its digits is 111476736, while the sum is 69.

The spelling of 398661471888 in words is "three hundred ninety-eight billion, six hundred sixty-one million, four hundred seventy-one thousand, eight hundred eighty-eight".