404020872 has 80 divisors (see below), whose sum is σ = 1142404560. Its totient is φ = 133392096.

The previous prime is 404020867. The next prime is 404020879. The reversal of 404020872 is 278020404.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (404020879) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 66423 + ... + 72249.

It is an arithmetic number, because the mean of its divisors is an integer number (14280057).

Almost surely, 2^404020872 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 404020872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (571202280).

404020872 is an abundant number, since it is smaller than the sum of its proper divisors (738383688).

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

404020872 is a wasteful number, since it uses less digits than its factorization.

404020872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5952 (or 5939 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 404020872 is about 20100.2704459418. The cubic root of 404020872 is about 739.2669097386.

The spelling of 404020872 in words is "four hundred four million, twenty thousand, eight hundred seventy-two".