351404720 has 20 divisors (see below), whose sum is σ = 817016160. Its totient is φ = 140561856.

The previous prime is 351404707. The next prime is 351404723. The reversal of 351404720 is 27404153.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 351404720.

It is not an unprimeable number, because it can be changed into a prime (351404723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2196200 + ... + 2196359.

It is an arithmetic number, because the mean of its divisors is an integer number (40850808).

Almost surely, 2^351404720 is an apocalyptic number.

It is an amenable number.

351404720 is an abundant number, since it is smaller than the sum of its proper divisors (465611440).

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

351404720 is a wasteful number, since it uses less digits than its factorization.

351404720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4392572 (or 4392566 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 351404720 is about 18745.7920611534. The cubic root of 351404720 is about 705.6714224557.

Adding to 351404720 its reverse (27404153), we get a palindrome (378808873).

The spelling of 351404720 in words is "three hundred fifty-one million, four hundred four thousand, seven hundred twenty".