7851238690 has 32 divisors (see below), whose sum is σ = 14991070464. Its totient is φ = 2950321920.

The previous prime is 7851238627. The next prime is 7851238699. The reversal of 7851238690 is 968321587.

It is a super-2 number, since 2×7851238690² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7851238699) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 50775 + ... + 135205.

It is an arithmetic number, because the mean of its divisors is an integer number (468470952).

Almost surely, 2^7851238690 is an apocalyptic number.

7851238690 is a deficient number, since it is larger than the sum of its proper divisors (7139831774).

7851238690 is a wasteful number, since it uses less digits than its factorization.

7851238690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85002.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 7851238690 is about 88607.2157896861. The cubic root of 7851238690 is about 1987.5255803572.

The spelling of 7851238690 in words is "seven billion, eight hundred fifty-one million, two hundred thirty-eight thousand, six hundred ninety".