7200000 has 162 divisors, whose sum is σ = 25947558. Its totient is φ = 1920000.

The previous prime is 7199957. The next prime is 7200007. The reversal of 7200000 is 27.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 3 ways, for example, as 3326976 + 3873024 = 1824^2 + 1968^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7200007) 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 17 ways as a sum of consecutive naturals, for example, 1439998 + ... + 1440002.

Almost surely, 2^7200000 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 7200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12973779).

7200000 is an abundant number, since it is smaller than the sum of its proper divisors (18747558).

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

7200000 is an frugal number, since it uses more digits than its factorization.

7200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 9.

The square root of 7200000 is about 2683.2815729997. The cubic root of 7200000 is about 193.0978769211.

Adding to 7200000 its reverse (27), we get a palindrome (7200027).

The spelling of 7200000 in words is "seven million, two hundred thousand".