404212221340 has 24 divisors (see below), whose sum is σ = 878116206240. Its totient is φ = 156109547328.

The previous prime is 404212221307. The next prime is 404212221349. The reversal of 404212221340 is 43122212404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404212221349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348458232 + ... + 348459391.

It is an arithmetic number, because the mean of its divisors is an integer number (36588175260).

Almost surely, 2^404212221340 is an apocalyptic number.

It is an amenable number.

404212221340 is an abundant number, since it is smaller than the sum of its proper divisors (473903984900).

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

404212221340 is a wasteful number, since it uses less digits than its factorization.

404212221340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696917661 (or 696917659 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 404212221340 its reverse (43122212404), we get a palindrome (447334433744).

The spelling of 404212221340 in words is "four hundred four billion, two hundred twelve million, two hundred twenty-one thousand, three hundred forty".