7207920 has 160 divisors (see below), whose sum is σ = 25712640. Its totient is φ = 1854720.

The previous prime is 7207919. The next prime is 7207957. The reversal of 7207920 is 297027.

It is a super-2 number, since 2×7207920² = 103908221452800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

7207920 is a modest number, since divided by 7920 gives 720 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101485 + ... + 101555.

It is an arithmetic number, because the mean of its divisors is an integer number (160704).

Almost surely, 2^7207920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7207920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12856320).

7207920 is an abundant number, since it is smaller than the sum of its proper divisors (18504720).

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

7207920 is a wasteful number, since it uses less digits than its factorization.

7207920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 7207920 is about 2684.7569722416. The cubic root of 7207920 is about 193.1686535309.

The spelling of 7207920 in words is "seven million, two hundred seven thousand, nine hundred twenty".