7290020 has 24 divisors (see below), whose sum is σ = 15838200. Its totient is φ = 2815232.

The previous prime is 7290001. The next prime is 7290037. The reversal of 7290020 is 200927.

It can be written as a sum of positive squares in 4 ways, for example, as 2896804 + 4393216 = 1702^2 + 2096^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 7289974 and 7290001.

It is an unprimeable number.

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, 5705 + ... + 6864.

It is an arithmetic number, because the mean of its divisors is an integer number (659925).

Almost surely, 2^7290020 is an apocalyptic number.

It is an amenable number.

7290020 is an abundant number, since it is smaller than the sum of its proper divisors (8548180).

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

7290020 is a wasteful number, since it uses less digits than its factorization.

7290020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12607 (or 12605 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 7290020 is about 2700.0037037012. The cubic root of 7290020 is about 193.8992994224.

Subtracting from 7290020 its sum of digits (20), we obtain a square (7290000 = 2700²).

Adding to 7290020 its reverse (200927), we get a palindrome (7490947).

The spelling of 7290020 in words is "seven million, two hundred ninety thousand, twenty".