2406221720 has 64 divisors (see below), whose sum is σ = 6191665920. Its totient is φ = 824425344.

The previous prime is 2406221681. The next prime is 2406221749. The reversal of 2406221720 is 271226042.

It is a self number, because there is not a number n which added to its sum of digits gives 2406221720.

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, 749639 + ... + 752841.

It is an arithmetic number, because the mean of its divisors is an integer number (96744780).

Almost surely, 2^2406221720 is an apocalyptic number.

2406221720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2406221720 is an abundant number, since it is smaller than the sum of its proper divisors (3785444200).

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

2406221720 is a wasteful number, since it uses less digits than its factorization.

2406221720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5904 (or 5900 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 2406221720 is about 49053.2539185730. The cubic root of 2406221720 is about 1340.0218530631.

Adding to 2406221720 its reverse (271226042), we get a palindrome (2677447762).

The spelling of 2406221720 in words is "two billion, four hundred six million, two hundred twenty-one thousand, seven hundred twenty".