404121330 has 24 divisors (see below), whose sum is σ = 1050715692. Its totient is φ = 107765664.

The previous prime is 404121307. The next prime is 404121371. The reversal of 404121330 is 33121404.

It can be written as a sum of positive squares in 2 ways, for example, as 374538609 + 29582721 = 19353^2 + 5439^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2245029 + ... + 2245208.

Almost surely, 2^404121330 is an apocalyptic number.

404121330 is an abundant number, since it is smaller than the sum of its proper divisors (646594362).

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

404121330 is a wasteful number, since it uses less digits than its factorization.

404121330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490250 (or 4490247 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 404121330 is about 20102.7692122255. The cubic root of 404121330 is about 739.3281764751.

Adding to 404121330 its reverse (33121404), we get a palindrome (437242734).

The spelling of 404121330 in words is "four hundred four million, one hundred twenty-one thousand, three hundred thirty".