404401091280 has 40 divisors (see below), whose sum is σ = 1253643383712. Its totient is φ = 107840290944.

The previous prime is 404401091273. The next prime is 404401091299. The reversal of 404401091280 is 82190104404.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 842502034 + ... + 842502513.

Almost surely, 2^404401091280 is an apocalyptic number.

404401091280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404401091280 is an abundant number, since it is smaller than the sum of its proper divisors (849242292432).

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

404401091280 is a wasteful number, since it uses less digits than its factorization.

404401091280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685004563 (or 1685004557 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

Adding to 404401091280 its reverse (82190104404), we get a palindrome (486591195684).

The spelling of 404401091280 in words is "four hundred four billion, four hundred one million, ninety-one thousand, two hundred eighty".