7128909792 has 120 divisors (see below), whose sum is σ = 21642489792. Its totient is φ = 2299622400.

The previous prime is 7128909791. The next prime is 7128909793. The reversal of 7128909792 is 2979098217.

It is an interprime number because it is at equal distance from previous prime (7128909791) and next prime (7128909793).

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 (7128909791) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35992 + ... + 124712.

Almost surely, 2^7128909792 is an apocalyptic number.

7128909792 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7128909792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10821244896).

7128909792 is an abundant number, since it is smaller than the sum of its proper divisors (14513580000).

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

7128909792 is a wasteful number, since it uses less digits than its factorization.

7128909792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88774 (or 88757 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 7128909792 is about 84432.8715134100. The cubic root of 7128909792 is about 1924.6024741178.

The spelling of 7128909792 in words is "seven billion, one hundred twenty-eight million, nine hundred nine thousand, seven hundred ninety-two".