8001949860 has 36 divisors (see below), whose sum is σ = 24272581788. Its totient is φ = 2133853248.

The previous prime is 8001949859. The next prime is 8001949873. The reversal of 8001949860 is 689491008.

It can be written as a sum of positive squares in 2 ways, for example, as 5496146496 + 2505803364 = 74136^2 + 50058^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22227459 + ... + 22227818.

It is an arithmetic number, because the mean of its divisors is an integer number (674238383).

Almost surely, 2^8001949860 is an apocalyptic number.

It is an amenable number.

8001949860 is an abundant number, since it is smaller than the sum of its proper divisors (16270631928).

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

8001949860 is a wasteful number, since it uses less digits than its factorization.

8001949860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44455292 (or 44455287 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 8001949860 is about 89453.6184846650. The cubic root of 8001949860 is about 2000.1624751339.

The spelling of 8001949860 in words is "eight billion, one million, nine hundred forty-nine thousand, eight hundred sixty".