404402280 has 64 divisors (see below), whose sum is σ = 1215466560. Its totient is φ = 107639808.

The previous prime is 404402279. The next prime is 404402281. The reversal of 404402280 is 82204404.

It is an interprime number because it is at equal distance from previous prime (404402279) and next prime (404402281).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 404402280.

It is not an unprimeable number, because it can be changed into a prime (404402281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68319 + ... + 74001.

It is an arithmetic number, because the mean of its divisors is an integer number (18991665).

Almost surely, 2^404402280 is an apocalyptic number.

404402280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404402280 is an abundant number, since it is smaller than the sum of its proper divisors (811064280).

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

404402280 is a wasteful number, since it uses less digits than its factorization.

404402280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6290 (or 6286 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 404402280 is about 20109.7558413821. The cubic root of 404402280 is about 739.4994667281.

Adding to 404402280 its reverse (82204404), we get a palindrome (486606684).

The spelling of 404402280 in words is "four hundred four million, four hundred two thousand, two hundred eighty".