401289128 has 16 divisors (see below), whose sum is σ = 752760000. Its totient is φ = 200553136.

The previous prime is 401289113. The next prime is 401289151. The reversal of 401289128 is 821982104.

It is a super-3 number, since 3×401289128³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9473 + ... + 29871.

It is an arithmetic number, because the mean of its divisors is an integer number (47047500).

Almost surely, 2^401289128 is an apocalyptic number.

It is an amenable number.

401289128 is a deficient number, since it is larger than the sum of its proper divisors (351470872).

401289128 is a wasteful number, since it uses less digits than its factorization.

401289128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22864 (or 22860 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 401289128 is about 20032.2022753366. The cubic root of 401289128 is about 737.5969822859.

The spelling of 401289128 in words is "four hundred one million, two hundred eighty-nine thousand, one hundred twenty-eight".