2209016720 has 40 divisors (see below), whose sum is σ = 5438082744. Its totient is φ = 831629312.

The previous prime is 2209016701. The next prime is 2209016743. The reversal of 2209016720 is 276109022.

It can be written as a sum of positive squares in 4 ways, for example, as 1111022224 + 1097994496 = 33332^2 + 33136^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810779 + ... + 813498.

Almost surely, 2^2209016720 is an apocalyptic number.

2209016720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2209016720 is an abundant number, since it is smaller than the sum of its proper divisors (3229066024).

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

2209016720 is a wasteful number, since it uses less digits than its factorization.

2209016720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624307 (or 1624301 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 2209016720 is about 47000.1778720038. The cubic root of 2209016720 is about 1302.3658535369.

The spelling of 2209016720 in words is "two billion, two hundred nine million, sixteen thousand, seven hundred twenty".