7849128390 has 128 divisors (see below), whose sum is σ = 19943718912. Its totient is φ = 1974360960.

The previous prime is 7849128389. The next prime is 7849128409. The reversal of 7849128390 is 938219487.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6417319 + ... + 6418541.

It is an arithmetic number, because the mean of its divisors is an integer number (155810304).

Almost surely, 2^7849128390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7849128390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9971859456).

7849128390 is an abundant number, since it is smaller than the sum of its proper divisors (12094590522).

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

7849128390 is a wasteful number, since it uses less digits than its factorization.

7849128390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 7849128390 is about 88595.3068170092. The cubic root of 7849128390 is about 1987.3474916402.

The spelling of 7849128390 in words is "seven billion, eight hundred forty-nine million, one hundred twenty-eight thousand, three hundred ninety".