404880381 has 36 divisors (see below), whose sum is σ = 636746292. Its totient is φ = 247048704.

The previous prime is 404880379. The next prime is 404880401. The reversal of 404880381 is 183088404.

It can be written as a sum of positive squares in 6 ways, for example, as 166177881 + 238702500 = 12891^2 + 15450^2 .

It is not a de Polignac number, because 404880381 - 2¹ = 404880379 is a prime.

It is a super-2 number, since 2×404880381² = 327856245837410322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404880341) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 208491 + ... + 210423.

It is an arithmetic number, because the mean of its divisors is an integer number (17687397).

Almost surely, 2^404880381 is an apocalyptic number.

It is an amenable number.

404880381 is a deficient number, since it is larger than the sum of its proper divisors (231865911).

404880381 is a wasteful number, since it uses less digits than its factorization.

404880381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030 (or 1990 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 404880381 is about 20121.6396200707. The cubic root of 404880381 is about 739.7907741829.

The spelling of 404880381 in words is "four hundred four million, eight hundred eighty thousand, three hundred eighty-one".