8463640890 has 32 divisors (see below), whose sum is σ = 20426230080. Its totient is φ = 2244360704.

The previous prime is 8463640849. The next prime is 8463640897. The reversal of 8463640890 is 980463648.

It is a super-2 number, since 2×8463640890² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8463640897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 782679 + ... + 793418.

It is an arithmetic number, because the mean of its divisors is an integer number (638319690).

Almost surely, 2^8463640890 is an apocalyptic number.

8463640890 is an abundant number, since it is smaller than the sum of its proper divisors (11962589190).

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

8463640890 is a wasteful number, since it uses less digits than its factorization.

8463640890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576286.

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 8463640890 is about 91998.0482945155. The cubic root of 8463640890 is about 2037.9134832231.

The spelling of 8463640890 in words is "eight billion, four hundred sixty-three million, six hundred forty thousand, eight hundred ninety".