868220813400 has 384 divisors, whose sum is σ = 2816097883200. Its totient is φ = 221095526400.

The previous prime is 868220813387. The next prime is 868220813479. The reversal of 868220813400 is 4318022868.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 246022836 + ... + 246026364.

Almost surely, 2^868220813400 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 868220813400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1408048941600).

868220813400 is an abundant number, since it is smaller than the sum of its proper divisors (1947877069800).

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

868220813400 is a wasteful number, since it uses less digits than its factorization.

868220813400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3799 (or 3790 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 868220813400 in words is "eight hundred sixty-eight billion, two hundred twenty million, eight hundred thirteen thousand, four hundred".