868291380 has 192 divisors, whose sum is σ = 2972712960. Its totient is φ = 208656000.

The previous prime is 868291379. The next prime is 868291427. The reversal of 868291380 is 83192868.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 753805 + ... + 754955.

It is an arithmetic number, because the mean of its divisors is an integer number (15482880).

Almost surely, 2^868291380 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 868291380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1486356480).

868291380 is an abundant number, since it is smaller than the sum of its proper divisors (2104421580).

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

868291380 is a wasteful number, since it uses less digits than its factorization.

868291380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307 (or 1299 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 868291380 is about 29466.7843511979. The cubic root of 868291380 is about 954.0149121517.

It can be divided in two parts, 86829 and 1380, that added together give a square (88209 = 297²).

The spelling of 868291380 in words is "eight hundred sixty-eight million, two hundred ninety-one thousand, three hundred eighty".