7210220128 has 24 divisors (see below), whose sum is σ = 14298743592. Its totient is φ = 3578793216.

The previous prime is 7210220099. The next prime is 7210220137. The reversal of 7210220128 is 8210220127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817950 + ... + 826717.

It is an arithmetic number, because the mean of its divisors is an integer number (595780983).

Almost surely, 2^7210220128 is an apocalyptic number.

It is an amenable number.

7210220128 is a deficient number, since it is larger than the sum of its proper divisors (7088523464).

7210220128 is a wasteful number, since it uses less digits than its factorization.

7210220128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644814 (or 1644806 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 7210220128 is about 84913.0150683628. The cubic root of 7210220128 is about 1931.8919877260.

Subtracting 7210220128 from its reverse (8210220127), we obtain a palindrome (999999999).

The spelling of 7210220128 in words is "seven billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-eight".