404007280 has 20 divisors (see below), whose sum is σ = 939317112. Its totient is φ = 161602880.

The previous prime is 404007271. The next prime is 404007311. The reversal of 404007280 is 82700404.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×404007280³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2524966 + ... + 2525125.

Almost surely, 2^404007280 is an apocalyptic number.

404007280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404007280 is an abundant number, since it is smaller than the sum of its proper divisors (535309832).

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

404007280 is a wasteful number, since it uses less digits than its factorization.

404007280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050104 (or 5050098 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 404007280 is about 20099.9323381946. The cubic root of 404007280 is about 739.2586195493.

Adding to 404007280 its reverse (82700404), we get a palindrome (486707684).

The spelling of 404007280 in words is "four hundred four million, seven thousand, two hundred eighty".