401209389 has 32 divisors (see below), whose sum is σ = 697667840. Its totient is φ = 223062336.

The previous prime is 401209379. The next prime is 401209421. The reversal of 401209389 is 983902104.

It is not a de Polignac number, because 401209389 - 2⁴ = 401209373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401209349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21694 + ... + 35679.

It is an arithmetic number, because the mean of its divisors is an integer number (21802120).

Almost surely, 2^401209389 is an apocalyptic number.

It is an amenable number.

401209389 is a deficient number, since it is larger than the sum of its proper divisors (296458451).

401209389 is a wasteful number, since it uses less digits than its factorization.

401209389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57426 (or 57420 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 401209389 is about 20030.2119060184. The cubic root of 401209389 is about 737.5481237964.

The spelling of 401209389 in words is "four hundred one million, two hundred nine thousand, three hundred eighty-nine".