8707861890 has 432 divisors, whose sum is σ = 29868516288. Its totient is φ = 1723078656.

The previous prime is 8707861889. The next prime is 8707861951. The reversal of 8707861890 is 981687078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 30769689 + ... + 30769971.

It is an arithmetic number, because the mean of its divisors is an integer number (69140084).

Almost surely, 2^8707861890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8707861890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14934258144).

8707861890 is an abundant number, since it is smaller than the sum of its proper divisors (21160654398).

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

8707861890 is a wasteful number, since it uses less digits than its factorization.

8707861890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 54.

The square root of 8707861890 is about 93315.9251682155. The cubic root of 8707861890 is about 2057.3294556885.

The spelling of 8707861890 in words is "eight billion, seven hundred seven million, eight hundred sixty-one thousand, eight hundred ninety".