401989889 has 8 divisors (see below), whose sum is σ = 461054208. Its totient is φ = 343334880.

The previous prime is 401989823. The next prime is 401989937. The reversal of 401989889 is 988989104.

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

It is a de Polignac number, because none of the positive numbers 2^k-401989889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401985889) 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, 100217 + ... + 104150.

It is an arithmetic number, because the mean of its divisors is an integer number (57631776).

Almost surely, 2^401989889 is an apocalyptic number.

It is an amenable number.

401989889 is a deficient number, since it is larger than the sum of its proper divisors (59064319).

401989889 is a wasteful number, since it uses less digits than its factorization.

401989889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204655.

The product of its (nonzero) digits is 1492992, while the sum is 56.

The square root of 401989889 is about 20049.6855087555. The cubic root of 401989889 is about 738.0260815590.

The spelling of 401989889 in words is "four hundred one million, nine hundred eighty-nine thousand, eight hundred eighty-nine".