404344780 has 96 divisors (see below), whose sum is σ = 1009999872. Its totient is φ = 133056000.

The previous prime is 404344777. The next prime is 404344789. The reversal of 404344780 is 87443404.

It is a super-2 number, since 2×404344780² = 326989402226496800, which contains 22 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (404344789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 655032 + ... + 655648.

It is an arithmetic number, because the mean of its divisors is an integer number (10520832).

Almost surely, 2^404344780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404344780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504999936).

404344780 is an abundant number, since it is smaller than the sum of its proper divisors (605655092).

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

404344780 is a wasteful number, since it uses less digits than its factorization.

404344780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815 (or 813 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 404344780 is about 20108.3261362054. The cubic root of 404344780 is about 739.4644164519.

The spelling of 404344780 in words is "four hundred four million, three hundred forty-four thousand, seven hundred eighty".