7200020 has 24 divisors (see below), whose sum is σ = 15222984. Its totient is φ = 2860416.

The previous prime is 7200007. The next prime is 7200023. The reversal of 7200020 is 200027.

It can be written as a sum of positive squares in 4 ways, for example, as 81796 + 7118224 = 286^2 + 2668^2 .

It is a super-3 number, since 3×7200020³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7199974 and 7200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7200023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1994 + ... + 4286.

It is an arithmetic number, because the mean of its divisors is an integer number (634291).

Almost surely, 2^7200020 is an apocalyptic number.

It is an amenable number.

7200020 is an abundant number, since it is smaller than the sum of its proper divisors (8022964).

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

7200020 is a wasteful number, since it uses less digits than its factorization.

7200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459 (or 2457 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 11.

The square root of 7200020 is about 2683.2852997771. The cubic root of 7200020 is about 193.0980557153.

Adding to 7200020 its reverse (200027), we get a palindrome (7400047).

It can be divided in two parts, 72000 and 20, that multiplied together give a square (1440000 = 1200²).

The spelling of 7200020 in words is "seven million, two hundred thousand, twenty".