404021339 has 16 divisors (see below), whose sum is σ = 437314080. Its totient is φ = 372003840.

The previous prime is 404021333. The next prime is 404021363. The reversal of 404021339 is 933120404.

It is a cyclic number.

It is not a de Polignac number, because 404021339 - 2²⁰ = 402972763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404021333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242999 + ... + 244655.

It is an arithmetic number, because the mean of its divisors is an integer number (27332130).

Almost surely, 2^404021339 is an apocalyptic number.

404021339 is a deficient number, since it is larger than the sum of its proper divisors (33292741).

404021339 is a wasteful number, since it uses less digits than its factorization.

404021339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 404021339 is about 20100.2820626975. The cubic root of 404021339 is about 739.2671945733.

The spelling of 404021339 in words is "four hundred four million, twenty-one thousand, three hundred thirty-nine".