7650881238 has 128 divisors (see below), whose sum is σ = 21100907520. Its totient is φ = 1784747520.

The previous prime is 7650881237. The next prime is 7650881243. The reversal of 7650881238 is 8321880567.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7650881237) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 205008 + ... + 239436.

It is an arithmetic number, because the mean of its divisors is an integer number (164850840).

Almost surely, 2^7650881238 is an apocalyptic number.

7650881238 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 7650881238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10550453760).

7650881238 is an abundant number, since it is smaller than the sum of its proper divisors (13450026282).

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

7650881238 is a wasteful number, since it uses less digits than its factorization.

7650881238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34502.

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 7650881238 is about 87469.3159799481. The cubic root of 7650881238 is about 1970.4729930081.

It can be divided in two parts, 7650 and 881238, that added together give a palindrome (888888).

The spelling of 7650881238 in words is "seven billion, six hundred fifty million, eight hundred eighty-one thousand, two hundred thirty-eight".