404213340 has 48 divisors (see below), whose sum is σ = 1168312320. Its totient is φ = 104312640.

The previous prime is 404213323. The next prime is 404213393. The reversal of 404213340 is 43312404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106800 + ... + 110519.

It is an arithmetic number, because the mean of its divisors is an integer number (24339840).

Almost surely, 2^404213340 is an apocalyptic number.

It is an amenable number.

404213340 is an abundant number, since it is smaller than the sum of its proper divisors (764098980).

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

404213340 is a wasteful number, since it uses less digits than its factorization.

404213340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217362 (or 217360 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 404213340 is about 20105.0575726607. The cubic root of 404213340 is about 739.3842820870.

Adding to 404213340 its reverse (43312404), we get a palindrome (447525744).

The spelling of 404213340 in words is "four hundred four million, two hundred thirteen thousand, three hundred forty".