7170985728 has 90 divisors (see below), whose sum is σ = 21382643744. Its totient is φ = 2390321664.

The previous prime is 7170985721. The next prime is 7170985733. The reversal of 7170985728 is 8275890717.

It is a happy number.

It is a super-2 number, since 2×7170985728² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7170985721) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 152176 + ... + 193647.

Almost surely, 2^7170985728 is an apocalyptic number.

It is an amenable number.

7170985728 is an abundant number, since it is smaller than the sum of its proper divisors (14211658016).

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

7170985728 is an equidigital number, since it uses as much as digits as its factorization.

7170985728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345851 (or 345828 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 54.

The square root of 7170985728 is about 84681.6729168715. The cubic root of 7170985728 is about 1928.3814835998.

The spelling of 7170985728 in words is "seven billion, one hundred seventy million, nine hundred eighty-five thousand, seven hundred twenty-eight".