7128252040 has 128 divisors (see below), whose sum is σ = 20778912000. Its totient is φ = 2137218048.

The previous prime is 7128251993. The next prime is 7128252067. The reversal of 7128252040 is 402528217.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7128251993 and 7128252011.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17626 + ... + 120694.

It is an arithmetic number, because the mean of its divisors is an integer number (162335250).

Almost surely, 2^7128252040 is an apocalyptic number.

7128252040 is a gapful number since it is divisible by the number (70) 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 7128252040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10389456000).

7128252040 is an abundant number, since it is smaller than the sum of its proper divisors (13650659960).

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

7128252040 is a wasteful number, since it uses less digits than its factorization.

7128252040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103119 (or 103115 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 7128252040 is about 84428.9763055315. The cubic root of 7128252040 is about 1924.5432808657.

The spelling of 7128252040 in words is "seven billion, one hundred twenty-eight million, two hundred fifty-two thousand, forty".