868640976 has 320 divisors, whose sum is σ = 3077660160. Its totient is φ = 228925440.

The previous prime is 868640963. The next prime is 868640989. The reversal of 868640976 is 679046868.

It is an interprime number because it is at equal distance from previous prime (868640963) and next prime (868640989).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3135750 + ... + 3136026.

It is an arithmetic number, because the mean of its divisors is an integer number (9617688).

Almost surely, 2^868640976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 868640976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1538830080).

868640976 is an abundant number, since it is smaller than the sum of its proper divisors (2209019184).

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

868640976 is a wasteful number, since it uses less digits than its factorization.

868640976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The square root of 868640976 is about 29472.7157893534. The cubic root of 868640976 is about 954.1429317903.

The spelling of 868640976 in words is "eight hundred sixty-eight million, six hundred forty thousand, nine hundred seventy-six".