7128204356 has 72 divisors (see below), whose sum is σ = 15935721984. Its totient is φ = 2728926720.

The previous prime is 7128204341. The next prime is 7128204361. The reversal of 7128204356 is 6534028217.

It is a happy number.

It is a super-2 number, since 2×7128204356² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122396 + ... + 170988.

It is an arithmetic number, because the mean of its divisors is an integer number (221329472).

Almost surely, 2^7128204356 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 7128204356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7967860992).

7128204356 is an abundant number, since it is smaller than the sum of its proper divisors (8807517628).

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

7128204356 is a wasteful number, since it uses less digits than its factorization.

7128204356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48661 (or 48646 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 7128204356 is about 84428.6939138585. The cubic root of 7128204356 is about 1924.5389894852.

The spelling of 7128204356 in words is "seven billion, one hundred twenty-eight million, two hundred four thousand, three hundred fifty-six".