404013280 has 48 divisors (see below), whose sum is σ = 1041256944. Its totient is φ = 146913280.

The previous prime is 404013263. The next prime is 404013287. The reversal of 404013280 is 82310404.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404013287) 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, 113017 + ... + 116536.

It is an arithmetic number, because the mean of its divisors is an integer number (21692853).

Almost surely, 2^404013280 is an apocalyptic number.

404013280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404013280 is an abundant number, since it is smaller than the sum of its proper divisors (637243664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404013280 is a wasteful number, since it uses less digits than its factorization.

404013280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229579 (or 229571 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 404013280 is about 20100.0815918742. The cubic root of 404013280 is about 739.2622791614.

Adding to 404013280 its reverse (82310404), we get a palindrome (486323684).

It can be divided in two parts, 40401 and 3280, that added together give a square (43681 = 209²).

The spelling of 404013280 in words is "four hundred four million, thirteen thousand, two hundred eighty".