7209646920 has 256 divisors, whose sum is σ = 27669772800. Its totient is φ = 1635655680.

The previous prime is 7209646897. The next prime is 7209646931. The reversal of 7209646920 is 296469027.

It is a super-2 number, since 2×7209646920² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1032240 + ... + 1039200.

It is an arithmetic number, because the mean of its divisors is an integer number (108085050).

Almost surely, 2^7209646920 is an apocalyptic number.

7209646920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7209646920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13834886400).

7209646920 is an abundant number, since it is smaller than the sum of its proper divisors (20460125880).

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

7209646920 is a wasteful number, since it uses less digits than its factorization.

7209646920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7125 (or 7115 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 7209646920 is about 84909.6397354270. The cubic root of 7209646920 is about 1931.8407916335.

The spelling of 7209646920 in words is "seven billion, two hundred nine million, six hundred forty-six thousand, nine hundred twenty".